Runtime "No disk in drive" errors

SGaist

Hi,

When you ran your application outside Qt Creator, did you deploy it properly ?

Rory_1

I just made sure the necessary dll were added to the folder with myapp.exe.

Qt5Core.dll
QtGui.dll
QtWidgets.dll

SGaist

3 DLLs only ? Looks suspicious because you should not be able to run your application because of the missing platform plugin. You should run windeployqt, that will grab all necessary Qt dependencies.

Rory_1

I ran windeployqt and it added Qt5Svg.dll. However, this did not solve my problem.

C:\Qt\Qt5.5.1\5.5\msvc2013_64\bin>windeployqt "C:\Program Files\Winnow"
C:\Program Files\Winnow\winnow.exe 64 bit, release executable
Adding Qt5Svg for qsvgicon.dll
Direct dependencies: Qt5Core Qt5Gui Qt5Widgets
All dependencies : Qt5Core Qt5Gui Qt5Widgets
To be deployed : Qt5Core Qt5Gui Qt5Svg Qt5Widgets
Warning: Cannot find Visual Studio installation directory, VCINSTALLDIR is not set.
Qt5Core.dll is up to date.
Qt5Gui.dll is up to date.
Updating Qt5Svg.dll.

Rory_1

I also tried copying my exe file "Winnow.exe" to the Qt bin folder, where all the dll's reside. I still get the same error. If I work past the error messages for each "No disk in drive" error then my app works just fine with just the original 3 dll's I listed.

SGaist

Are you doing anything special or simply setting the QFileSystemModel on the QTreeView is enough to trigger that ?

Rory_1

@SGaist

Nothing special. As I mentioned, I get the same result with the Dir View example. However, I am continuing to explore your suggestion about deployment. I am working on figuring out what VCINSTALLDIR should be set to. I do not have a license for Visual Studio. I forget what I ended up downloading to get the VC compiler, but as a result I do have Microsoft Visual Studio 12.0. I'm guessing if I set VCINSTALLDIR correctly then windeployqt may install something I need.

Okay, this worked I think. I set VCINSTALLDIR = C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC and windeployqt ran without errors or warnings. My app seems to be working now.

Thanks very much for getting me pointed in the right direction!!

Rory_1

It turns out this topic is not solved. I found another reference to the problem: "I'm using QDir().isReadable to check if a drive is readable. In the Qt Creator it runs fine, but when I run the exe it keeps giving me errors" here.

The temporary solution to set HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Windows\ErrorMode = 2 is working.

Is there a known work around in Qt?

SGaist

Did you test the code provided in the same answer ?

Rory_1

@SGaist

If you are asking whether I used the code, I did not. I did make the change to the registry, which works for now.