I have been unable to get pyNastran (v0.7.2) to open an OP2 file from an NX-based simulation. The traceback I get is as follows: INFO: fname=op2.py lineNo=107 vectorized=True combine=True INFO: ...
Here's the traceback and debug info... I'm not able to provide you the op2 unfortunately. I have skip_undefined_matrices=True defined, but it still fails. This is using 1.1-dev DEBUG: op2.py:434 ...