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Qt app work on boot ubuntu

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  • A Offline
    A Offline
    asisisyah
    wrote on last edited by
    #1

    i make an Application through Qt, than i run it with myApp.service (/etc/systemd/system , i tried all systemctl command)file but its not work on boot , window is open it and close. if in terminal sudo ./myApp its work properly. i tried Startup command in ubuntu but its same error. my App is Qt Gui application and control gpio. i made basic Qt application than tried it and its worked. but myApp is not work.

    1 Reply Last reply
    0
    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi,

      Which version of Qt are you using ?
      With which backend ?
      Are you ensuring that you start your application only when the graphics server is fully started ?
      Do you have anything else that is starting ?
      Do you have any logs that might shed some light about what is happening ?

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      1 Reply Last reply
      0
      • A Offline
        A Offline
        asisisyah
        wrote on last edited by
        #3

        Merhaba

        Which version of Qt are you using ?

        Qt 5 on nvidia jetson nano aarch64

        With which backend ?

        backend i dont know it what does mean .

        Are you ensuring that you start your application only when the graphics server is fully started ?

        i think yes . my service file is include
        After=display-manager.service multi-user.target

        sudo systemctl daemon-reload
        sudo systemctl enable myApp.service
        sudo systemctl start myApp.service
        sudo systemctl status myApp.service says that:
        Loaded: loaded (/etc/systemd/system/myApp.service; enabled; vendor preset: enabled)
        Active: activating (auto-restart) (Result: core-dump) since Sun 2024-01-07 21:15:19 UTC; 1s ago
        Process: 3370 ExecStart=/usr/local/bin/myApp/myApp
        (code=dumped, signal=ABRT)
        Main PID: 3370 (code=dumped, signal=ABRT)
        nvidia@nvidia-desktop:~$
        if i run with in terminal sudo its work. but
        sudo systemctl start myApp.service says that:

        Do you have anything else that is starting ?

        yes i made little another app. like this myApp2 its working perfect.

        Do you have any logs that might shed some light about what is happening ?

        yes i wrote systemctl status.. myApp using https://github.com/Rubberazer/JETGPIO library.
        myApp Qt gui. and little sqllite. camera and my program write txt log file in workingdirectory.
        but myApp is working in Terminal with sudo ./myApp

        JonBJ A 2 Replies Last reply
        0
        • A asisisyah

          Merhaba

          Which version of Qt are you using ?

          Qt 5 on nvidia jetson nano aarch64

          With which backend ?

          backend i dont know it what does mean .

          Are you ensuring that you start your application only when the graphics server is fully started ?

          i think yes . my service file is include
          After=display-manager.service multi-user.target

          sudo systemctl daemon-reload
          sudo systemctl enable myApp.service
          sudo systemctl start myApp.service
          sudo systemctl status myApp.service says that:
          Loaded: loaded (/etc/systemd/system/myApp.service; enabled; vendor preset: enabled)
          Active: activating (auto-restart) (Result: core-dump) since Sun 2024-01-07 21:15:19 UTC; 1s ago
          Process: 3370 ExecStart=/usr/local/bin/myApp/myApp
          (code=dumped, signal=ABRT)
          Main PID: 3370 (code=dumped, signal=ABRT)
          nvidia@nvidia-desktop:~$
          if i run with in terminal sudo its work. but
          sudo systemctl start myApp.service says that:

          Do you have anything else that is starting ?

          yes i made little another app. like this myApp2 its working perfect.

          Do you have any logs that might shed some light about what is happening ?

          yes i wrote systemctl status.. myApp using https://github.com/Rubberazer/JETGPIO library.
          myApp Qt gui. and little sqllite. camera and my program write txt log file in workingdirectory.
          but myApp is working in Terminal with sudo ./myApp

          JonBJ Offline
          JonBJ Offline
          JonB
          wrote on last edited by
          #4

          @asisisyah said in Qt app work on boot ubuntu:

          if i run with in terminal sudo its work. but

          Why does it need to be run via sudo ?? I would start by figuring that out, and then eliminating that.

          1 Reply Last reply
          0
          • A asisisyah

            Merhaba

            Which version of Qt are you using ?

            Qt 5 on nvidia jetson nano aarch64

            With which backend ?

            backend i dont know it what does mean .

            Are you ensuring that you start your application only when the graphics server is fully started ?

            i think yes . my service file is include
            After=display-manager.service multi-user.target

            sudo systemctl daemon-reload
            sudo systemctl enable myApp.service
            sudo systemctl start myApp.service
            sudo systemctl status myApp.service says that:
            Loaded: loaded (/etc/systemd/system/myApp.service; enabled; vendor preset: enabled)
            Active: activating (auto-restart) (Result: core-dump) since Sun 2024-01-07 21:15:19 UTC; 1s ago
            Process: 3370 ExecStart=/usr/local/bin/myApp/myApp
            (code=dumped, signal=ABRT)
            Main PID: 3370 (code=dumped, signal=ABRT)
            nvidia@nvidia-desktop:~$
            if i run with in terminal sudo its work. but
            sudo systemctl start myApp.service says that:

            Do you have anything else that is starting ?

            yes i made little another app. like this myApp2 its working perfect.

            Do you have any logs that might shed some light about what is happening ?

            yes i wrote systemctl status.. myApp using https://github.com/Rubberazer/JETGPIO library.
            myApp Qt gui. and little sqllite. camera and my program write txt log file in workingdirectory.
            but myApp is working in Terminal with sudo ./myApp

            A Offline
            A Offline
            asisisyah
            wrote on last edited by
            #5

            hi,
            i dont need sudo, i want that run mayApp on boot ;)
            but how is it..
            this is error journal
            myApp.service - myApp
            Loaded: loaded (/etc/systemd/system/myApp.service; enabled; vendor preset: enabled)
            Active: failed (Result: core-dump) since Sun 2024-01-07 21:12:33 UTC; 3s ago
            Process: 3662 ExecStartPre=/bin/bash -c while [ ! -e /dev/mem ]; do sleep 1; done (code=exited, status=0/SUCCESS)
            Process: 3663 ExecStart=/home/nvidia/Desktop/hardworks/myApp (code=dumped, signal=ABRT)
            Main PID: 3663 (code=dumped, signal=ABRT)

            Jan 07 21:12:33 nvidia-desktop systemd[1]: Starting LS...
            Jan 07 21:12:33 nvidia-desktop systemd[1]: Started LS.
            Jan 07 21:12:33 nvidia-desktop myApp[3663]: qt.qpa.xcb: could not connect to display
            Jan 07 21:12:33 nvidia-desktop myApp[3663]: qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
            Jan 07 21:12:33 nvidia-desktop myApp[3663]: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
            Jan 07 21:12:33 nvidia-desktop myApp[3663]: Available platform plugins are: dxcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-eg>
            Jan 07 21:12:33 nvidia-desktop systemd[1]: myApp.service: Main process exited, code=dumped, status=6/ABRT
            Jan 07 21:12:33 nvidia-desktop systemd[1]: myApp.service: Failed with result 'core-dump'.
            lines 1-15/15 (END)

            JonBJ A 2 Replies Last reply
            0
            • A asisisyah

              hi,
              i dont need sudo, i want that run mayApp on boot ;)
              but how is it..
              this is error journal
              myApp.service - myApp
              Loaded: loaded (/etc/systemd/system/myApp.service; enabled; vendor preset: enabled)
              Active: failed (Result: core-dump) since Sun 2024-01-07 21:12:33 UTC; 3s ago
              Process: 3662 ExecStartPre=/bin/bash -c while [ ! -e /dev/mem ]; do sleep 1; done (code=exited, status=0/SUCCESS)
              Process: 3663 ExecStart=/home/nvidia/Desktop/hardworks/myApp (code=dumped, signal=ABRT)
              Main PID: 3663 (code=dumped, signal=ABRT)

              Jan 07 21:12:33 nvidia-desktop systemd[1]: Starting LS...
              Jan 07 21:12:33 nvidia-desktop systemd[1]: Started LS.
              Jan 07 21:12:33 nvidia-desktop myApp[3663]: qt.qpa.xcb: could not connect to display
              Jan 07 21:12:33 nvidia-desktop myApp[3663]: qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
              Jan 07 21:12:33 nvidia-desktop myApp[3663]: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
              Jan 07 21:12:33 nvidia-desktop myApp[3663]: Available platform plugins are: dxcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-eg>
              Jan 07 21:12:33 nvidia-desktop systemd[1]: myApp.service: Main process exited, code=dumped, status=6/ABRT
              Jan 07 21:12:33 nvidia-desktop systemd[1]: myApp.service: Failed with result 'core-dump'.
              lines 1-15/15 (END)

              JonBJ Offline
              JonBJ Offline
              JonB
              wrote on last edited by JonB
              #6

              @asisisyah said in Qt app work on boot ubuntu:

              qt.qpa.xcb: could not connect to display

              And sure enough that is the reason, as we suggested. I don't know how you expect a UI program to find and connect to a display when it is run from boot rather than from the user's desktop.

              Strat by setting environment variable QT_DEBUG_PLUGINS to value 1. Then you will get possibly more helpful diagnostic output. How you set that variable when running from boot the way you do I do not know. It may be enough to just set the environment variable in the very first line of your code, before you create the QApplication. I cannot recall if that is early enough or whether it has to be set before the executable is even launched, but worth a try.

              1 Reply Last reply
              1
              • A asisisyah

                hi,
                i dont need sudo, i want that run mayApp on boot ;)
                but how is it..
                this is error journal
                myApp.service - myApp
                Loaded: loaded (/etc/systemd/system/myApp.service; enabled; vendor preset: enabled)
                Active: failed (Result: core-dump) since Sun 2024-01-07 21:12:33 UTC; 3s ago
                Process: 3662 ExecStartPre=/bin/bash -c while [ ! -e /dev/mem ]; do sleep 1; done (code=exited, status=0/SUCCESS)
                Process: 3663 ExecStart=/home/nvidia/Desktop/hardworks/myApp (code=dumped, signal=ABRT)
                Main PID: 3663 (code=dumped, signal=ABRT)

                Jan 07 21:12:33 nvidia-desktop systemd[1]: Starting LS...
                Jan 07 21:12:33 nvidia-desktop systemd[1]: Started LS.
                Jan 07 21:12:33 nvidia-desktop myApp[3663]: qt.qpa.xcb: could not connect to display
                Jan 07 21:12:33 nvidia-desktop myApp[3663]: qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
                Jan 07 21:12:33 nvidia-desktop myApp[3663]: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
                Jan 07 21:12:33 nvidia-desktop myApp[3663]: Available platform plugins are: dxcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-eg>
                Jan 07 21:12:33 nvidia-desktop systemd[1]: myApp.service: Main process exited, code=dumped, status=6/ABRT
                Jan 07 21:12:33 nvidia-desktop systemd[1]: myApp.service: Failed with result 'core-dump'.
                lines 1-15/15 (END)

                A Offline
                A Offline
                asisisyah
                wrote on last edited by
                #7

                @asisisyah
                yes i set it , but problem is that i used /dev/mem file for gpio , this is permitted and i dont know any solition. when my program start on boot or after the desktop , doesent mater for me, its not running because /dev/mem is permitted.. so i use sudo ..

                SGaistS A C 3 Replies Last reply
                0
                • A asisisyah

                  @asisisyah
                  yes i set it , but problem is that i used /dev/mem file for gpio , this is permitted and i dont know any solition. when my program start on boot or after the desktop , doesent mater for me, its not running because /dev/mem is permitted.. so i use sudo ..

                  SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #8

                  @asisisyah the usual way is to add the proper rights for the user to access the device. It's usually done through adding the user to a specific group.

                  Interested in AI ? www.idiap.ch
                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                  1 Reply Last reply
                  1
                  • A asisisyah

                    @asisisyah
                    yes i set it , but problem is that i used /dev/mem file for gpio , this is permitted and i dont know any solition. when my program start on boot or after the desktop , doesent mater for me, its not running because /dev/mem is permitted.. so i use sudo ..

                    A Offline
                    A Offline
                    asisisyah
                    wrote on last edited by
                    #9

                    @asisisyah
                    i tried but i dont make it.
                    maybe i must change gpiolib. can you suggest a library or easyes way for control. i use Qt and jetson orin nano and c++, because i use rubberazer jetgipio library . if i dont use jetgpio myApp did starting perfectly s on boot.

                    Thank you all

                    SGaistS A 2 Replies Last reply
                    0
                    • A asisisyah

                      @asisisyah
                      i tried but i dont make it.
                      maybe i must change gpiolib. can you suggest a library or easyes way for control. i use Qt and jetson orin nano and c++, because i use rubberazer jetgipio library . if i dont use jetgpio myApp did starting perfectly s on boot.

                      Thank you all

                      SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #10

                      @asisisyah what did you try exactly ?

                      Did you add the user that will start the application to the kmem group ?

                      Interested in AI ? www.idiap.ch
                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                      1 Reply Last reply
                      0
                      • A asisisyah

                        @asisisyah
                        i tried but i dont make it.
                        maybe i must change gpiolib. can you suggest a library or easyes way for control. i use Qt and jetson orin nano and c++, because i use rubberazer jetgipio library . if i dont use jetgpio myApp did starting perfectly s on boot.

                        Thank you all

                        A Offline
                        A Offline
                        asisisyah
                        wrote on last edited by
                        #11

                        @asisisyah
                        my user name is nvidia its add in group called nvidia.
                        i want say again
                        i have a program , its working in terminal with command sudo ./myApp.. i want start automaticly when system is open. thats all . its not to be that very hard. but i dont make it.
                        thank you all.

                        SGaistS A 2 Replies Last reply
                        0
                        • A asisisyah

                          @asisisyah
                          my user name is nvidia its add in group called nvidia.
                          i want say again
                          i have a program , its working in terminal with command sudo ./myApp.. i want start automaticly when system is open. thats all . its not to be that very hard. but i dont make it.
                          thank you all.

                          SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #12

                          @asisisyah you know that a user can be part of several groups ?

                          Interested in AI ? www.idiap.ch
                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                          1 Reply Last reply
                          0
                          • A asisisyah

                            @asisisyah
                            my user name is nvidia its add in group called nvidia.
                            i want say again
                            i have a program , its working in terminal with command sudo ./myApp.. i want start automaticly when system is open. thats all . its not to be that very hard. but i dont make it.
                            thank you all.

                            A Offline
                            A Offline
                            asisisyah
                            wrote on last edited by
                            #13

                            @asisisyah
                            i am sorry but no. i am newbe for linux.
                            please explain.
                            i must make it my project is end . everything is okey but its not start on automaticly. please explain step by step or i am goingto crazy.
                            regards.

                            SGaistS A 2 Replies Last reply
                            0
                            • A asisisyah

                              @asisisyah
                              i am sorry but no. i am newbe for linux.
                              please explain.
                              i must make it my project is end . everything is okey but its not start on automaticly. please explain step by step or i am goingto crazy.
                              regards.

                              SGaistS Offline
                              SGaistS Offline
                              SGaist
                              Lifetime Qt Champion
                              wrote on last edited by
                              #14

                              @asisisyah a quick search of "Linux add group to user" would have been quicker. See for example here.

                              Interested in AI ? www.idiap.ch
                              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                              1 Reply Last reply
                              1
                              • A asisisyah

                                @asisisyah
                                i am sorry but no. i am newbe for linux.
                                please explain.
                                i must make it my project is end . everything is okey but its not start on automaticly. please explain step by step or i am goingto crazy.
                                regards.

                                A Offline
                                A Offline
                                asisisyah
                                wrote on last edited by
                                #15

                                @asisisyah
                                i did add many group my username (nvidia)

                                nvidia@nvidia-desktop:~/Desktop$ groups
                                nvidia adm sudo audio video render gdm docker weston-launch gpio jtop
                                nvidia@nvidia-desktop:~/Desktop$ id
                                uid=1001(nvidia) gid=1001(nvidia) groups=1001(nvidia),4(adm),27(sudo),29(audio),44(video),103(render),130(gdm),132(docker),996(weston-launch),999(gpio),1002(jtop)
                                nvidia@nvidia-desktop:~/Desktop$ groups nvidia
                                nvidia : nvidia adm sudo audio video render gdm gpio weston-launch docker jtop
                                nvidia@nvidia-desktop:~/Desktop$ getent group
                                root:x:0:
                                daemon:x:1:
                                bin:x:2:
                                sys:x:3:
                                adm:x:4:syslog,{USERNAME},nvidia
                                tty:x:5:syslog
                                disk:x:6:
                                lp:x:7:
                                mail:x:8:
                                news:x:9:
                                uucp:x:10:
                                man:x:12:
                                proxy:x:13:
                                kmem:x:15:
                                dialout:x:20:
                                fax:x:21:
                                voice:x:22:
                                cdrom:x:24:
                                floppy:x:25:
                                tape:x:26:
                                sudo:x:27:{USERNAME},nvidia
                                audio:x:29:pulse,{USERNAME},nvidia
                                dip:x:30:
                                www-data:x:33:
                                backup:x:34:
                                operator:x:37:
                                list:x:38:
                                irc:x:39:
                                src:x:40:
                                gnats:x:41:
                                shadow:x:42:
                                utmp:x:43:
                                video:x:44:{USERNAME},gdm,nvidia
                                sasl:x:45:
                                plugdev:x:46:
                                staff:x:50:
                                games:x:60:
                                users:x:100:
                                nogroup:x:65534:
                                input:x:101:
                                kvm:x:102:
                                render:x:103:{USERNAME},nvidia
                                ssh:x:104:
                                dhcpd:x:105:
                                netdev:x:106:
                                systemd-timesync:x:107:
                                systemd-journal:x:108:
                                systemd-network:x:109:
                                systemd-resolve:x:110:
                                messagebus:x:111:
                                rdma:x:112:
                                i2c:x:113:
                                tss:x:114:
                                crontab:x:115:
                                lpadmin:x:116:
                                bluetooth:x:117:
                                ssl-cert:x:118:
                                whoopsie:x:119:
                                geoclue:x:120:
                                scanner:x:121:saned
                                pulse:x:122:
                                pulse-access:x:123:
                                avahi-autoipd:x:124:
                                saned:x:125:
                                rtkit:x:126:
                                colord:x:127:
                                avahi:x:128:
                                nm-openvpn:x:129:
                                gdm:x:130:{USERNAME},nvidia
                                syslog:x:131:
                                gpio:x:999:nvidia
                                trusty:x:998:
                                crypto:x:997:
                                weston-launch:x:996:{USERNAME},nvidia
                                {USERNAME}:x:1000:
                                nvidia:x:1001:
                                systemd-coredump:x:995:
                                debug:x:994:
                                docker:x:132:nvidia
                                fwupd-refresh:x:133:
                                jtop:x:1002:nvidia
                                nvidia@nvidia-desktop:~/Desktop$

                                1 Reply Last reply
                                0
                                • A asisisyah

                                  @asisisyah
                                  yes i set it , but problem is that i used /dev/mem file for gpio , this is permitted and i dont know any solition. when my program start on boot or after the desktop , doesent mater for me, its not running because /dev/mem is permitted.. so i use sudo ..

                                  C Offline
                                  C Offline
                                  ChrisW67
                                  wrote on last edited by
                                  #16

                                  @asisisyah said in Qt app work on boot ubuntu:

                                  yes i set it , but problem is that i used /dev/mem file for gpio ,

                                  This is my Ubuntu:

                                  $ ls -l /dev/mem
                                  crw-r----- 1 root kmem 1, 1 Jan 14 06:53 /dev/mem
                                  

                                  So, your process can read and write (rw-) /dev/mem if it is run as root (i.e. via sudo) , and read-only (r--) if your process is run by a user in the kmem group, and no access at all (---) for anyone else. This restriction is for a good reason.

                                  I will guess that your nvidia user is not in the kmem group; no standard Ubuntu user is.

                                  $ id -a chrisw
                                  uid=1000(chrisw) gid=1000(chrisw) groups=1000(chrisw),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),122(lpadmin),133(lxd),134(sambashare),136(docker),137(wireshark)
                                  

                                  and service accounts are generally far more restricted:

                                  $ id -a dnsmasq
                                  uid=111(dnsmasq) gid=65534(nogroup) groups=65534(nogroup)
                                  
                                  1 Reply Last reply
                                  0
                                  • A Offline
                                    A Offline
                                    asisisyah
                                    wrote on last edited by
                                    #17

                                    my /dev/mem ls -l
                                    $ ls -l /dev/mem
                                    crw-rw----- 1 root nvidia 1, 1 Jan 13 21:13 /dev/mem

                                    and please what i must do. if you explain i think i do it.
                                    step by step.

                                    thank you all

                                    SGaistS A 2 Replies Last reply
                                    0
                                    • A asisisyah

                                      my /dev/mem ls -l
                                      $ ls -l /dev/mem
                                      crw-rw----- 1 root nvidia 1, 1 Jan 13 21:13 /dev/mem

                                      and please what i must do. if you explain i think i do it.
                                      step by step.

                                      thank you all

                                      SGaistS Offline
                                      SGaistS Offline
                                      SGaist
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #18

                                      @asisisyah said in Qt app work on boot ubuntu:

                                      my /dev/mem ls -l
                                      $ ls -l /dev/mem
                                      crw-rw----- 1 root nvidia 1, 1 Jan 13 21:13 /dev/mem

                                      and please what i must do. if you explain i think i do it.
                                      step by step.

                                      thank you all

                                      Were these the original rights of the device ?

                                      Interested in AI ? www.idiap.ch
                                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                      1 Reply Last reply
                                      0
                                      • A asisisyah

                                        my /dev/mem ls -l
                                        $ ls -l /dev/mem
                                        crw-rw----- 1 root nvidia 1, 1 Jan 13 21:13 /dev/mem

                                        and please what i must do. if you explain i think i do it.
                                        step by step.

                                        thank you all

                                        A Offline
                                        A Offline
                                        asisisyah
                                        wrote on last edited by
                                        #19

                                        @asisisyah
                                        No , its not. Originally that root:root
                                        My user name : nvidia

                                        SGaistS A 2 Replies Last reply
                                        0
                                        • A asisisyah

                                          @asisisyah
                                          No , its not. Originally that root:root
                                          My user name : nvidia

                                          SGaistS Offline
                                          SGaistS Offline
                                          SGaist
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #20

                                          @asisisyah what distribution are you running on your device ?

                                          Interested in AI ? www.idiap.ch
                                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                          1 Reply Last reply
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