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QProcess : "Unknown error" when exitCode() != 0

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  • dheerendraD Offline
    dheerendraD Offline
    dheerendra
    Qt Champions 2022
    wrote on last edited by
    #3

    It is not a error at all. Is it creating process ? Which line the code is giving error ?

    Dheerendra
    @Community Service
    Certified Qt Specialist
    http://www.pthinks.com

    J 1 Reply Last reply
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    • mrjjM mrjj

      @Julie said in QProcess : "Unknown error" when exitCode() != 0:

      roi.exe

      Is that an Qt exe you call from another qt program?

      J Offline
      J Offline
      Julie
      wrote on last edited by
      #4

      hi @mrjj, it's a c program compile with cygwin.

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      • dheerendraD dheerendra

        It is not a error at all. Is it creating process ? Which line the code is giving error ?

        J Offline
        J Offline
        Julie
        wrote on last edited by
        #5

        hi @dheerendra ,
        When i compile my program there are no error it's only my QMessageBox in main.

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        • mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by
          #6

          @Julie said in QProcess : "Unknown error" when exitCode() != 0:

          cygwin

          Does it depend on any external dlls ?

          Also, if you run roi.exe in a cmd with same parameters, it does work?

          J 1 Reply Last reply
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          • mrjjM mrjj

            @Julie said in QProcess : "Unknown error" when exitCode() != 0:

            cygwin

            Does it depend on any external dlls ?

            Also, if you run roi.exe in a cmd with same parameters, it does work?

            J Offline
            J Offline
            Julie
            wrote on last edited by
            #7

            @mrjj , I always add dll and yes before new installation of windows it works. (all my project)

            0_1505229936871_1.png

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            • J Offline
              J Offline
              Julie
              wrote on last edited by
              #8

              Maybe it's important :

              now i compile with release but if i compile with debug i've an other problem :

              0_1505230171549_2.png

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              • mrjjM Offline
                mrjjM Offline
                mrjj
                Lifetime Qt Champion
                wrote on last edited by
                #9

                Hi
                When you run it in Creator it complains about missing platform ?
                Then you have a patch issue or installation issue.
                It should not happen as Creator setup where the app gets it Qt dlls from.

                J 1 Reply Last reply
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                • mrjjM mrjj

                  Hi
                  When you run it in Creator it complains about missing platform ?
                  Then you have a patch issue or installation issue.
                  It should not happen as Creator setup where the app gets it Qt dlls from.

                  J Offline
                  J Offline
                  Julie
                  wrote on last edited by Julie
                  #10

                  Hi @mrjj

                  sorry i don't understant your advise.

                  Here it's my folder with dll :

                  0_1505301963706_3.png

                  and here my .por file :

                  0_1505302051832_4.png

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                  • mrjjM Offline
                    mrjjM Offline
                    mrjj
                    Lifetime Qt Champion
                    wrote on last edited by
                    #11

                    Ok, it seems you try to run it OUTSIDE craetor ?
                    in a deployment folder ?

                    if yes, please see this

                    http://www.tripleboot.org/?p=138

                    you need a subfolder called platforms

                    J 1 Reply Last reply
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                    • mrjjM mrjj

                      Ok, it seems you try to run it OUTSIDE craetor ?
                      in a deployment folder ?

                      if yes, please see this

                      http://www.tripleboot.org/?p=138

                      you need a subfolder called platforms

                      J Offline
                      J Offline
                      Julie
                      wrote on last edited by
                      #12

                      @mrjj ,
                      oh no i run it with my IDE Qt creator.
                      But i try to follow your link.

                      mrjjM 1 Reply Last reply
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                      • J Julie

                        @mrjj ,
                        oh no i run it with my IDE Qt creator.
                        But i try to follow your link.

                        mrjjM Offline
                        mrjjM Offline
                        mrjj
                        Lifetime Qt Champion
                        wrote on last edited by mrjj
                        #13

                        @Julie
                        STOP

                        But when run for creator , no Qt dlls should be copied to the build folder.
                        This is not normal.

                        only foreign dlls like opencv and cyg stuff

                        Also u also include dlls with D in the end its for debug, but its a release folder.
                        So i think you somehow made a mess. :)

                        Its very unclear what you are doing.

                        Deplyment folder (the link) is for other computers. Not running via creator

                        You dont need it to run via creator.
                        So since you copied Qt DLLS to build folder, something seems not right for me.

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                        • mrjjM Offline
                          mrjjM Offline
                          mrjj
                          Lifetime Qt Champion
                          wrote on last edited by mrjj
                          #14

                          Hi

                          Please try
                          Select Projects, Run Settings, expand the Run Environment, and modify the PATH variable to include the folders for any extra dlls you need. opencv and cyg*
                          its explained in details in the manual.

                          J 2 Replies Last reply
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                          • mrjjM mrjj

                            Hi

                            Please try
                            Select Projects, Run Settings, expand the Run Environment, and modify the PATH variable to include the folders for any extra dlls you need. opencv and cyg*
                            its explained in details in the manual.

                            J Offline
                            J Offline
                            Julie
                            wrote on last edited by
                            #15

                            @mrjj

                            My computer had a problem and I reinstalled windows.
                            Before my program works but now no.
                            I only make "open project" in new intallation of Qt.

                            For the dll with "d" i know i see it in other topic. I try to change it but it worked less after.

                            I add manually the dll and the .exe under the "build-ProjetStage-Desktop_Qt_5_9_1_MinGW_32bit-Release\release" folder.

                            I read your link

                            mrjjM 1 Reply Last reply
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                            • J Julie

                              @mrjj

                              My computer had a problem and I reinstalled windows.
                              Before my program works but now no.
                              I only make "open project" in new intallation of Qt.

                              For the dll with "d" i know i see it in other topic. I try to change it but it worked less after.

                              I add manually the dll and the .exe under the "build-ProjetStage-Desktop_Qt_5_9_1_MinGW_32bit-Release\release" folder.

                              I read your link

                              mrjjM Offline
                              mrjjM Offline
                              mrjj
                              Lifetime Qt Champion
                              wrote on last edited by
                              #16

                              @Julie

                              ok, i guess it just need some paths then.
                              if same code used to work.

                              You really should make new default GUI project and see that runs.
                              Else something very wrong with your Qt installation.

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                              • mrjjM mrjj

                                Hi

                                Please try
                                Select Projects, Run Settings, expand the Run Environment, and modify the PATH variable to include the folders for any extra dlls you need. opencv and cyg*
                                its explained in details in the manual.

                                J Offline
                                J Offline
                                Julie
                                wrote on last edited by
                                #17

                                @mrjj If you know a better/clean method I love to know it.

                                mrjjM 1 Reply Last reply
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                                • J Julie

                                  @mrjj If you know a better/clean method I love to know it.

                                  mrjjM Offline
                                  mrjjM Offline
                                  mrjj
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #18

                                  @Julie

                                  Well put into the environment creator uses when u press run
                                  Select Projects, Run Settings, expand the Run Environment.
                                  here u can add paths to dlss and they are found when run.

                                  J 1 Reply Last reply
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                                  • mrjjM mrjj

                                    @Julie

                                    Well put into the environment creator uses when u press run
                                    Select Projects, Run Settings, expand the Run Environment.
                                    here u can add paths to dlss and they are found when run.

                                    J Offline
                                    J Offline
                                    Julie
                                    wrote on last edited by Julie
                                    #19

                                    @mrjj
                                    I create a new project and i add variables after variables and method after method.
                                    For the moment it's works. (but images are'nt visible now ;( )
                                    I'm going to add the first external .exe.
                                    You think i add it with "Select Projects, Run Settings, expand the Run Environment." ?

                                    I really want to say to you thanks for your help.

                                    mrjjM 1 Reply Last reply
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                                    • J Julie

                                      @mrjj
                                      I create a new project and i add variables after variables and method after method.
                                      For the moment it's works. (but images are'nt visible now ;( )
                                      I'm going to add the first external .exe.
                                      You think i add it with "Select Projects, Run Settings, expand the Run Environment." ?

                                      I really want to say to you thanks for your help.

                                      mrjjM Offline
                                      mrjjM Offline
                                      mrjj
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #20

                                      @Julie

                                      Its hard to say what went bad after you reinstalled windows.
                                      Maybe it had the right paths back then and Creator took them when you installed Qt.
                                      Im not sure about why it stopped working.

                                      • but images are'nt visible now

                                      What images ?

                                      You are very welcome. i hope you get it to run again.

                                      J 1 Reply Last reply
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                                      • mrjjM mrjj

                                        @Julie

                                        Its hard to say what went bad after you reinstalled windows.
                                        Maybe it had the right paths back then and Creator took them when you installed Qt.
                                        Im not sure about why it stopped working.

                                        • but images are'nt visible now

                                        What images ?

                                        You are very welcome. i hope you get it to run again.

                                        J Offline
                                        J Offline
                                        Julie
                                        wrote on last edited by Julie
                                        #21

                                        @mrjj

                                        I whant to deploying this project before the end of my job (Friday).
                                        I understant i must run with "release" and not "debug".
                                        I understant i must add my dll at "Select Projects, Run Settings, expand the Run Environment".

                                        0_1505314591452_2.png

                                        But outside Qt Creator it's like my dlls arn't add :

                                        0_1505312591464_6.png

                                        At the end i want deployed my application in static (i thinks it's better no ?)
                                        I whant it woks on windows and linux and the image on button it's visible (i use qrc ressources before it's works (again ^^) and know no).

                                        0_1505313402353_1.png

                                        1 Reply Last reply
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                                        • mrjjM Offline
                                          mrjjM Offline
                                          mrjj
                                          Lifetime Qt Champion
                                          wrote on last edited by mrjj
                                          #22

                                          hi
                                          Please STOP a moment
                                          you are mixing stuff up, or i really do not understand what you are doing :)

                                          1: running in creator.
                                          You need to add any dlls that is not part of the Qt so when Creator runs the app, it can find those extra dlls.
                                          That is the "expand the Run Environment" part. ( to PATH )
                                          There should be no need to add any Qt dlls for that.
                                          Setting ANYTHING here have no effect on deployment what so ever.

                                          2: Deployment
                                          Running the app on another computer with no Qt installed.
                                          For that you need the deploy folder with the right subfolders and
                                          all extra Dlls and the Qt ones you need.
                                          There is a tool call windeployqt
                                          http://doc.qt.io/qt-5/windows-deployment.html
                                          that can help copy the right QT dlls to the folder.

                                          This deployment folder, you then give to others and they can run the application.
                                          For more info about the deployment folder, i like this site alot
                                          http://www.tripleboot.org/?p=138

                                          And AGAIN, deployment and running in Creator is 2 VERY different things.

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