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Hello, It gives some errors in a model I created; 3D mesh quality gives errors in bolts, pins and bushings. There is 100% error rate for LENGTH. I am sharing the model in the attachment, I would be very happy if you could help.
Usually this is related to contact issues or parts not properly connected.
Your .out file shows us that there are large Average Displacements, so a part of your model is probably flying away.
Try running your model with the control card PARAM,EXPERTNL,CNTSTB to add some numerical stabilization to your contacts.
Additionally, try reducing a little bit the initial increment, by settting a small DT value inside your NLPARM card (i.e. 0.01).
There are a few tips in this post as well:
https://community.altair.com/community?id=community_blog&sys_id=538764ab1b3790d4a5f742eddc4bcba4
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