I tried the converter for an example called 2d included with sofa examples. The code generated had two errors. One with this line
"uniformmass->setMass( 1 1 0.83333 );"
So I think there is something wrong with the way the arguments are given, and the other is with Rigidmapping.
The compilier does not identify RigidMapping as a valid identifier, which means probably that the header file is missing or maybe the namespace definition is missing.
Your documentation does not include an example on how to use your tool. In the document it says give the filename of the scn or xml file which I did, but it wouldn't work. So what I found was that we do not need to give the .scn or .xml extension for the tool to work.