simtk.org

Hi all,

I am running Moco simulations, and sometimes the server crashes, or the IPOPT optimizer does not converge, etc. Regardless of the reasons, then Python is exited and I lose all variables, in particular my intermediate solution.

Is there any way to take a snapshot of my solution every few iterations and dump it in a sto file, like it is done with checkpoints in machine learning?

Hi Pagnon,

This is possible through CasADi's intermediate callback feature, but it's currently broken in Moco. We have an issue tracking the bug here: https://github.com/opensim-org/opensim-core/issues/3265.

In the meantime, you could always set the maximum iterations limit on your problem to get an "intermediate" solution for debugging. Not ideal, I know, but better than nothing.

Best,
Nick

Well that's life! At least I know I can stop searching, and in the meantime I subscribed to the issue in order to be notified when it is fixed