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need more info, sounds like a setup issue
What info do you need?
I have tried a static analysis, with and without large displacement.
Also tried a non-lineair analysis but didn't work either.
Used different solvers, different contact sets, different connectors, different mesh qualities.
I have run out of ideas to solve this problem.
if it helps i could upload my model? (although i'm not really sure how to do that)
you haven't provided any information about what the model looks like
what physics/loads are included
how it is restrained
how it is connected together
generally my recommendation would be to go to a very simple gravity load, see if you can get the problem to solve, that will ensure you have your contacts and restraints defined properly. if you don't get past that you need to work on restraints and contact.
if that is successful, reduce the magnitude of your load, see if it solves. if it does, your load is too high or you'll need to work through some solving difficulties
feel free to post your model using the pack and go function from solidworks and the advanced editor at the top right