Thanks for response and I also got this error in GenParaMesh method:

itk::ExceptionObject (0xbfbdcb04)
Location: "Unknown"
File: /home/lbompard/NeuroLib/Libraries/Shape/Algorithms/BinaryMask3DEqualAreaParametricMeshSource.txx
Line: 172
Description: Warning: Euler equation not satisfied. Euler Number : 15636 - 15638 = -2

How can I fix the problem?

Thanks
Gozde