Error termination for LS-TASC optimization

Hi,

I am running a topology optimization simulation for an impact problem in LS-TASC and my simulation terminates after 5th iteration and the log file (joblog) says that the nodes referred to in the node-set do not exist. I believe LS-TASC has deleted certain elements and nodes that is why they don't exist but it should be similar in other iterations as well I guess. I have attached the log file screenshot for reference. Can someone help me resolve this error? Any help is appreciated!

(I did try reducing the impact velocity but it didn't help).


Thanks 

Anurag

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