Hi everybody.

I've written a class to read and write EM maps in Spider format in IMP. Runs perfect in C++ when combined with DensityMap and MRCReaderWriter from EMbed:

#include "IMP/em/SpiderReaderWriter.h" #include "DensityMap.h" #include "MRCReaderWriter.h"

int main() { // Constructor IMP::em::SpiderMapReaderWriter rw("media_mon_iter3.xmp",false,false,true); MRCReaderWriter rw2; DensityMap m; m.Read("media_mon_iter3.xmp",rw); m.Write("test.xmp",rw); m.Write("test.mrc",rw2); }

When wrapped in Python, after modifying modules/em/pyext/em.i with this: %import "MapReaderWriter.h" %include "IMP/em/SpiderReaderWriter.h"

And trying to do exactly the same thing: def test_em_maps(self): """Check volume reading and writing""" rw1=em.SpiderMapReaderWriter("media_mon_iter3.xmp",False,False,True) rw2=EM.MRCReaderWriter() m=EM.DensityMap() m.Read("media_mon_iter3.xmp",rw1) m.Write("test.mrc",rw2) m.Write("test.xmp",rw1)

I obtain this error:

====================================================================== ERROR: Check volume reading and writing ---------------------------------------------------------------------- Traceback (most recent call last): File "test_volumes_and_images.py", line 74, in test_em_maps m.Read("media_mon_iter3.xmp",rw1) File "/diva1/home/modeller/SVN/modlib/EM.py", line 698, in Read def Read(*args): return _EM.DensityMap_Read(*args) TypeError: in method 'DensityMap_Read', argument 3 of type 'MapReaderWriter &'

----------------------------------------------------------------------

Seems that SWIG is not wrapping properly MapReaderWriter or is getting confused by passing a IMP object like SpiderMapReaderWriter to the EMbed class DensityMap. Any help?

Thanks