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[1617836513]

I set up the settings for restart in the static structure as in figure 1, after that I want to continue the calculation after clicking on the STOP button (without making any changes to the model in the meantime), and I chose a sub-step before the last step of the convergence calculation. But it appears that the restart point is invalid, why is this?

[harshvardhan.negi]

Hi,
There can be multiple reasons for the solver to remove/modify restart points.

You can check out the following links about restart points in Ansys and see if they have something that can help you out:
18.5. Using Solution Restarts
16.1.4. Restart Analysis

I hope this helps.

Regards,
Harshvardhan