Why does this superelement use pass require so much memory?
This problem runs out of memory during symbolic assembly with the USE pass solution.
There are only ~2300 rows in the superelement, however the reason we run out of memory
is that there are 1637 nodes in the superelement and there are 6 DOF (because of the shell
elements in the GEN pass). That means the superelement matrix size in symbolic assembly
is ~10000x10000 which is about 800 MB. Plus, we have three copies of this element matrix
in memory during symbolic assembly and so on the Windows 32-bit OS this will exceed the 2GB
of memory address space that is available (Ref: Defect 48225)
A workaround is to use the undocumented ASSOPT,,FRONT to activate the 6.0 matrix assembly