I'm using Nastran Nx to solve a structural optimization with Sol 200. Seams that, after few cycles, the run stops and at the end of the file f.06 there is this message:
MAIN: "Access violation" (C0000005) exception encountered.
MAIN: For reference, A(MAINAL) = 140001090, A(/SYSTEM/) = 142983D60
MAIN: A(/OPENZZ/) = 479E040
MAIN: Exception occurred at address 000000014108C977.
MAIN: Program attempted to access data at location 000000000479DB88.
MAIN: Context Flags 0010005F
What this is means and how can run the simulation whitout problems?
Is it possible to share f06 and log of your NX Nastran run ?