Maintenance tool error: "Cannot open file "" for writing: No error"

[hskoglund]

Hi, check your TEMP and TMP environment variables, if they point to non-existing directories on your PC, then Maintenance Tool gives this error.

If that's the case also for you: one quick solution:

set temp=
set tmp=
c:\qt\maintenancetool.exe

[mcleary]

@hskoglund I'll try again this evening and report back. Thanks for the tip

[mcleary]

@hskoglund No luck with this solution. Same error. I even tried the offline installer but I get the following message.

Any tips?

[hskoglund]

Hi, just guessing, but if you copy the offline installer .exe file to somewhere on your C: drive (instead of E:) and invoke it from there (and using the same incantations, set temp= and set tmp=

[mcleary]

@hskoglund Unfortunately same error. When running "Writing maintenance tool." it gives me the same error dialog.

Unfortunately I have no clues on what could be wrong with my system.

[aha_1980]

Hi@mcleary,

did you run the tool as normal user or as administrator?

If you have run it as admin before, you will probably need to do so again.

Also, ave you checked there is enough free space on your drives?

Regards.

[hskoglund]

Also, to add to @aha_1980, if you have an antivirus program running (other than the one built in with Windows 10) try disable it

[mcleary]

I tried running as admin but the same message keeps popping.

I do have plenty of space (more than 100GB free) and I don't have any antivirus software installed.

I am trying to run some debug tools like process monitor to see if I can figure it out without reinstalling everything.

[hskoglund]

Ok, more one guess :-) try installing Qt to some other place/directory than what you've done so far, e.g. instead of C:\Qt try C:\Qt2

[mcleary]

No luck, same error. There is something wrong with the Maintenance tool path

[hskoglund]

Yeah, as a last ditch, you could try one more setting:

set path=
qt-opensource-windows-x86-5.14.1.exe

(if there's some bad stuff in your path setting)

[mcleary]

@hskoglund Does this hangs any bells?

[mcleary]

@hskoglund No luck clearing the path.

[hskoglund]

Hmm name collision, interesting...
Ok try to set another, explicit TEMP path, first create a directory (say C:\Temp that's guaranteed to be empty), then try:

set temp=C:\Temp
set tmp=C:\Temp
qt-opensource-windows-x86-5.14.1.exe

[mcleary]

Same problem. Fortunately if I kill the installer process while this dialog is being displayed I can keep the installation, I just don't have the maintenance tool. This is enough for me to keep working for now.

Thanks for the help

[mcleary]

Right, so now I can say for sure that there is something wrong with the installer.

I just tried the installer in a brand new machine and I get the same message:

Right after it finishes downloading the repositories.

Now I am pretty sure it is not just my machine anymore.

[hskoglund]

Hmm just installed Qt 5.14.1 using the online installer qt-unified-windows-x86-3.2.1-2-online.exe on a Windows 10 PC:

(I selected only MSVC2017 64-bit and answered No for participating in the telemetry/statistics.)

Maybe it's something with different versions of Windows 10? I have version 19.03 10.0.18362.657 (the version numbers can be seen on the 1st line when you open a CMD window).

Your 2 Windows 10 PCs that go south, are they running the same version of Windows 10?

[mcleary]

Really appreciate the help.

Is that the online installer? Using the online installer I can't even get to the page to select which Qt version to install.

So one Windows is exactly the same as yours, 19.03 10.0.18362.657

The other one is 19.09 10.0.0.18363.592

[hskoglund]

Yep it was the online installer. (I can try with the offline version soon.)

So the problem you have when using the online installer, "can't even get to the page..." do you get an error message or does the online installer just die at that point?

[mcleary]

So, you can see exactly what is happening in this small recording I just did: https://webmshare.com/play/mKdNX