4.7.1 imageformats/qjpeg[d]4.dll unloaded

[bmn]

When running my program, QImageWriter::supportedImageFormats() doesn't contain the jpg format. The VS debugger output tells me the following:

'my.exe': Loaded 'D:\pathtoexe\imageformats\qjpegd4.dll', Cannot find or open the PDB file
'my.exe': Unloaded 'D:\pathtoexe\imageformats\qjpegd4.dll'

This tells me that the paths are ok. I verified that all the Qt DLLs I'm using (core, gui, xml, opengl) are version 4.7.1 (File properties in Windows Explorer). What else could be the problem? Why is the DLL unloaded?

Edit: When setting QT_DEBUG_PLUGINS to 1, I get an error message mentioning a faulty side-by-side configuration (original message in German). I'm on Windows 7 btw.

[bah]

Does the plugin fails to load:
1 - on a computer where Qt is installed?
2 - on a computer without Qt?

Case 1:
Check whether the required plugin exists on your Qt installation (search for libjpeg[d]4.dll inside %QTDIR%/plugins/imageformats)

Case 2:
Make sure you deploy the required dll (libjpeg[d]4.dll) inside an imageformats folder on the application root dir (in your case D:\pathtoexe\imageformats\). The dll to be shipped is the one inside the %QTDIR%/plugins/imageformats folder, not the one found inside the bin folder on some Qt installations.

[bmn]

The DLL from %QTDIR%/plugins/imageformats did the trick, thanks.