Ushnish Basu
Ansys Employee

This is an internal error in LS-DYNA that would need to be fixed if it hasn't been already. You can ask you Ansys contact to see if they can provide access to a current Dev version to see if this issue has been fixed.

In the meantime, I would suggest that you take out the CONTACT cards one at a time to see which one may be causing the issue (or take them all out and put them in one at a time)

Please also make sure that you don't have overlapping contacts in your model