How do I determine the cause of Qt's "*** is not a valid Qt plugin" error?

Posted by chadjoan on Stack Overflow See other posts from Stack Overflow or by chadjoan
Published on 2013-11-11T23:27:31Z Indexed on 2013/11/12 3:54 UTC
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qt

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dll

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qt4

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pyside

When I print the value of errorString from my QPluginLoader object, I get this:

The file 'C:/pyprojects/test/qsqlpsqld4.dll' is not a valid Qt plugin.

I would like to avoid some days worth of doing the time consuming "guess-and-check" methodology that my current internet searches reveal (so far none of them seem relevant anyways).

Is there a way for me to get the Qt library itself to tell me why it is refusing to load this plugin?

I don't want to guess; I want to know.

Context:

I am on Windows 7 running Qt 4.8.5 (32-bit, MinGW) and the qsqlpsqld4.dll file is also 32-bit and compiled with MinGW.

I am using PySide to interact with Qt.

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