Ali Kamali

Tnx @peter for ypur suggetion.

1.i used auto time steppeing with those values but it took more than 2 hours and also 1% progress, so i stopped it.

2. I ran the model with previous setting and i took image of force covergence plot.However, if you scroll up and down, there are several pages of this plot in the solution output. But in this image as highlighted, it is the first time that the solution has not converged.