Is this a sign of insufficient memory ?

yhr_123

I use optistruct to optimize a model, it stops at the 9th step and doesn't finish this job. The solver displays following information:

The amount of memory allocated for the run is 800 MB. This run will use in-core processing in the solver. MUMPS solver will allocate memory separately and may run in different core (in/out) mode. INFEASIBLE DESIGN (AT LEAST ONE CONSTRAINT VIOLATED).

what dose it mean? How to solve this problem?

Adriano_Koga

you should look at your .out file generated by the solver.

It will show you the evolution of your optimization, wrt constraints violation and objective function.

The optimizer is probably having a hard time reaching the desired design constraints, so that you should review your problem statement, and make sure it is well formulated. If yes, them you might need to re-think your design criterea.