Hi Rob,

I've tried the following to try to resolve the issue: reduced Fluent time step, increased Fluent time step, reduced Rocky timestep, increased Rocky timestep, reduced Fluent mesh size, increased Fluent mesh size, and I have also reduced the convergence conditions in Fluent.

I previously used ESSS Rocky for a year without any of these errors. I've set up the same case file for Rocky and Fluent that once ran successfully using ESSS Rocky, however, running the same simulation in Ansys Rocky has resulted in the floating point error. It appears that there may be a bug in the software. Could you please look into this?

Thank you,