Negative volume error

I am getting a negative volume error when running a simulation even after I have commented out the lines that update the particle volume on mpm_explicit.tcc. The output error is as follows:

[particle2d::0] [error] /mpm/include/particles/particle.tcc #451: Particle volume cannot be negative

Does this error happen when you are running a MPI parallel job? Could you try running a single node job and see if you get this error?

I was indeed running a MPI parallel job. I recently ran a job on a single node with only 1 MPI tasks and this error did not occur anymore. Previously, the error occurred with only a few steps and now it has run for over 620,000 steps and is still running without any reported problems.

Try running the simulation now, this error should be fixed now. If not let us know.