failed when read KGG from op4 binary file

[xper0418]

Hi. First of all, thank you for your support in advance. I've got following error when read KGG from binary op4. The size of sparse matrix KGG is 311,244 x 311,244.

File "\pyNastran\op4\op4.py", line 770, in _read_matrix_binary raise NotImplementedError(msg) NotImplementedError: record_length=0 filename='test.op4'

[SteveDoyle2]

I need a small example to do anything.

[drcavaliere]

Hello,

I get the same error. I attach the op4 file I am working with and the equivalent ascii file. I am trying to read the KAA and MAA matrices: KM.zip

This is my code for the extraction process:

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

import os import time import pyNastran

pkg_path = pyNastran.path[0]

from pyNastran.utils import print_bad_path from pyNastran.op4.op4 import read_op4 import numpy as np from numpy import float32, float64, int32, int64, product

op4_filename = 'KM_binary.op4' assert os.path.exists(op4_filename), print_bad_path(op4_filename)

specify the file

matrices = read_op4(op4_filename)

extract a matrix

formK, K = matrices['KAA'] formM, M = matrices['MAA']

#---------------------------------------------------

This is the error I get:

Traceback (most recent call last): File "test_pyNastran.py", line 47, in get_pyNastran matrices = read_op4(op4_filename, precision='double') File "/pyNastran/op4/op4.py", line 95, in read_op4 return op4.read_op4(op4_filename, matrix_names, precision) File "/pyNastran/op4/op4.py", line 137, in read_op4 return self.read_op4_binary(op4_filename, matrix_names, precision) File "/pyNastran/op4/op4.py", line 686, in read_op4_binary (name, form, matrix) = self._read_matrix_binary(op4, precision, matrix_names) File "pyNastran/op4/op4.py", line 770, in _read_matrix_binary raise NotImplementedError(msg) NotImplementedError: record_length=1638401 filename='KM_binary.op4'

Let me know if you need extra information.

Thank you for your help,

Fabiola

[SteveDoyle2]

Can you create a small example (under 100 KB)? It's too big to look at a binary file. One element is the ideal size. Also, I need the bdf/dat file that goes with it.

Beyond that, I'm super busy at work right now and have quite the backlog.