Dear developer,
Sorry to bother you, I have successfully installed the ngsolve and ngsxfem and done some calculation with ngsolve. When I try the tutorials and the demos in the ngsxfem, the test cases with class CutInfo, the programme cracks with :
segmentation fault (core damped)
PS: Other functions and class works well in ngsxfem, I can create the levelset function and etc such the demos lsetgeoms.py without any problem.
