Hi all,

The following script runs correctly, builds without errors, but then the
dist exe fails to run after using PyInstaller 2.1:

import matplotlib.backends.backend_qt4agg
print('hello')

The error is:
module = imp.load_module(fullname, fp, filename, self._c_ext_tuple)
ImportError: DLL load failed: The specified procedure could not be found.

I edited the PyInstaller pyi_importers.py script to print the filename that
is not loading. It shows the error occurs when trying to load
PyQt4.QtCore.pyd. Of course, PyQt4.QtCore.pyd is on my system, is included
in the one-dir folder, and works in all other cases. The problem is clearly
with matplotlib.backends.backend_qt4agg

I've seen various discussions about matplotlib. I can get matplotlib to
build, but I start getting problems with importing PyQt4 at the same time.
PyQT4 on its own is fine. There seems to be some kind of conflict with
PyQt4.Any suggestions?

Laurence.

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