Issue reading GEOM data from OP2 file

[Daniel]

Hello,

I am trying to read in geometry data for a superelement from an OP2 file but am encountering an error, see below:

>>> import pyNastran
>>> pyNastran.__version__
'1.4.1'
>>> from pyNastran.op2.op2_geom import OP2Geom
>>> model = OP2Geom(mode='nx')
>>> model.read_op2('xxxxxx.op2')
INFO:    op2_scalar.py:1964           op2_filename = 'xxxxxx.op2'
WARNING: op2_common.py:2303           64-bit precision is poorly supported

ndata = 8:
  strings = (b'9\x00\x00\x00\x00\x00\x00\x00',)
  ints    = (57, 0)
  floats  = (7.987401246651457e-44, 0.0)
  doubles (float64) = (2.8e-322,)
  long long (int64) = (57,)

WARNING: op2_reader.py:616            0 XSOP2DIR
WARNING: op2_reader.py:614            skipping PVT0
WARNING: op2_reader.py:616            1 GEOM1EX
WARNING: op2_reader.py:616            2 GEOM2EX
WARNING: op2_reader.py:616            3 GEOM4EX
WARNING: op2_reader.py:616            4 GEOM1EXA
WARNING: op2_reader.py:616            5 GEOM2EXA
WARNING: op2_reader.py:616            6 GEOM4EXA
WARNING: op2_reader.py:616            7 MATK
WARNING: op2_reader.py:616            8 MATM
WARNING: op2_reader.py:616            9 MATV
WARNING: op2_reader.py:616            10 TUG1
WARNING: op2_reader.py:616            11 MUG1
WARNING: op2_reader.py:616            12 TEF1
WARNING: op2_reader.py:616            13 MEF1
INFO:    read_extdb.py:436            -3 A: name='GEOM1' -> 'GEOM1EX'
INFO:    read_extdb.py:548            name = 'GEOM1' size=8
INFO:    read_extdb.py:548            name = 'GEOM1' size=8
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\xxxxxx\AppData\Local\Programs\Python\Python312\Lib\site-packages\pyNastran\op2\op2_geom.py", line 318, in read_op2
    OP2.read_op2(self, op2_filename=op2_filename, combine=combine,
  File "C:\Users\xxxxxx\AppData\Local\Programs\Python\Python312\Lib\site-packages\pyNastran\op2\op2.py", line 612, in read_op2
    OP2_Scalar.read_op2(self, op2_filename=self.op2_filename, mode=mode)
  File "C:\Users\xxxxxx\AppData\Local\Programs\Python\Python312\Lib\site-packages\pyNastran\op2\op2_interface\op2_scalar.py", line 1999, in read_op2
    self._read_tables(table_name, table_names)
  File "C:\Users\xxxxxx\AppData\Local\Programs\Python\Python312\Lib\site-packages\pyNastran\op2\op2_interface\op2_scalar.py", line 2188, in _read_tables
    func()
  File "C:\Users\xxxxxx\AppData\Local\Programs\Python\Python312\Lib\site-packages\pyNastran\op2\op2_interface\read_extdb.py", line 578, in read_extdb
    read_extdb_geomx(op2_reader, data, endian, op2.reader_geom1.geom1_map)
  File "C:\Users\xxxxxx\AppData\Local\Programs\Python\Python312\Lib\site-packages\pyNastran\op2\op2_interface\extdb.py", line 226, in read_extdb_geomx
    func(data, n)
  File "C:\Users\xxxxxx\AppData\Local\Programs\Python\Python312\Lib\site-packages\pyNastran\op2\tables\geom\geom1.py", line 31, in _read_fake
    return self.op2._read_fake(data, n)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\xxxxxx\AppData\Local\Programs\Python\Python312\Lib\site-packages\pyNastran\op2\tables\geom\geom_common.py", line 38, in _read_fake
    self.log.info(f'geom skipping {self.card_name} in {self.table_name}; ndata={len(data)-12}')
                                   ^^^^^^^^^^^^^^
AttributeError: 'OP2Geom' object has no attribute 'card_name'

Any help would be appreciated. Thank you!

-Daniel

[Daniel]

Adding an example OP2 file. https://drive.google.com/file/d/1P6PFYjeBbJ2VdCtzGPYWmOHw2HtmPDHE/view?usp=sharing

[Steven Doyle]

Daniel,

I'll have to take a look at the crash, but op2 superelements are not supported. The goal is to skip them. I'm not the best at them and they're not documented in the manuals.

Steve

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[Daniel]

Ah, thanks for clarifying that. I also tried pulling the geometry data from a punch file but had trouble with that as well. I opened an issue regarding that in GitHub before I found this discussion forum. Here is a link to that issue: https://github.com/SteveDoyle2/pyNastran/issues/813 .

Thanks for taking the time to respond!

-Daniel