Is there any progress on this issue?
I can confirm some issues for windows versions of Calculix 2.16, 2.18, 2.19 and 2.20 and solid finite elements. It seems that CalculiX is able to solve problems with smaller number of nodes (for me, it is around 1000) but fails for a larger model (for me it is around 5000 nodes). It fails for PaStiX and Spooles solvers. I think it fails after the frequency step finishes and steady state dynamic step starts. It outputs the result for the starting frequency of the steady state dynamic step.
But I run a test with about 100.000 nodes on 2.16 version for Linux and it works. So maybe it is only a windows problem?