[Python] Using a Python module generated with Boost: did not match C++ signature

I am using a software called Mitsuba. It comes along with a Python implementation, wrapped with Boost. This line in Python:

scene = SceneHandler.loadScene(fileResolver.resolve("model.xml"), paramMap)


yields an error. The type of fileResolver.resolve is fs:ath and the type of paramMap is ParameterMap according to the documentation.

The function signature in the C++ code is:

SceneHandler::loadScene(const fs:ath &filename, const ParameterMap &params)


The error is:

Traceback (most recent call last):
File "...\foo.py", line 22, in <module>
scene = SceneHandler.loadScene(fileResolver.resolve("model.xml"), paramMap)
ArgumentError: Python argument types in
SceneHandler.loadScene(str, StringMap)
did not match C++ signature:
loadScene(class boost::filesystem2::basic_path<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,struct boost::filesystem2:ath_traits>, class std::map<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,struct mitsuba::SimpleStringOrdering,class std::allocator<struct std:air<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const ,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > >)


What further investigations can I make? Do you know where the problem comes from?

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