'<' not supported between complex and complex

[bohmmastermind]

I get an error
TypeError: '<' not supported between instances of 'complex' and 'complex'
when I try to convert my result to vtu. However, I am sure the result itself is correct, Calculix runs without issues and cgx is able to show them to me.

The boundary conditions might be a bit conservative, but they work. The issue seems to arise from line 784 in common, where it fails to compute eigenvalues. From an earlier issue, I saw that the MPI version of ccx can cause problems. But other examples work just fine.

Mesh: (txt -> inp)
beam_mesh.inp

Resultfile: (txt -> frd)
beam_sanity_check.frd

Inputfile:

*INCLUDE, INPUT=beam_mesh.inp

*MATERIAL, NAME=elastic
*ELASTIC
29.4,0.47

*SOLID SECTION, ELSET=eall, MATERIAL=elastic

*STEP, INC=100
*STATIC
0.1,1.0

*BOUNDARY
X0, 1, 1, 0.0
*BOUNDARY
Y0, 2, 2, 0.0
*BOUNDARY
Bottom, 3, 3, 0.0
*BOUNDARY
Load, 1, 1, 1.0

*NODE FILE, FREQUENCY=1
U
*EL FILE, FREQUENCY=1
S,E
*END STEP

[bennyschnabel]

I run into the same error. Of 100 time increments, only 54 are converted. Then the error

TypeError: '<' not supported between instances of 'complex' and 'complex'

is shown.

[pl96andy]

hi all i guess i came across same problem
my file is:

SAMPLE-v.txt
For conversion on windows, everything seems fine
But on conversion in ubuntu i am getting error:
INFO: Reading SAMPLE-v.frd INFO: 12094 nodes INFO: 1624 cells INFO: 1 time increment(s) Traceback (most recent call last): File "/home/vdi-user/python-default/bin/ccxToVTK", line 8, in <module> sys.exit(ccx_to_vtk()) ^^^^^^^^^^^^ File "/home/vdi-user/python-default/lib/python3.12/site-packages/ccx2paraview/cli.py", line 68, in ccx_to_vtk main_with_format("vtk") File "/home/vdi-user/python-default/lib/python3.12/site-packages/ccx2paraview/cli.py", line 63, in main_with_format ccx2paraview.run() File "/home/vdi-user/python-default/lib/python3.12/site-packages/ccx2paraview/common.py", line 911, in run result_blocks = self.frd.parse_results(step, inc) # NOTE Could be empty list [] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/vdi-user/python-default/lib/python3.12/site-packages/ccx2paraview/common.py", line 691, in parse_results result_blocks.append(self.calculate_principal(b)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/vdi-user/python-default/lib/python3.12/site-packages/ccx2paraview/common.py", line 784, in calculate_principal eigenvalues = sorted(np.linalg.eigvals(tensor).tolist()) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ TypeError: '<' not supported between instances of 'complex' and 'complex'
hope this will be helpfull