Hi* everyone!

I am trying to finish calculating a thermal simulation using Tnavigator. I am very new with this software. it is a simulation for a period of 14 months. 1 timestep a month. it was calculated for 13 timesteps already and then stopped due to "not sufficient minimal timestep". the previous 13 steps did not show issues in convergence.

I have tried switching the "max timestep* min timestep* iterations number" and there is no progress yet.

I would apreciate any comments or any literature recommendation for this issue and software.

Thank you in advance!

Allan