I'm not an expert at simulation but my best guess would be that your fixed geometry is not creating a stable analysis. That warning sounds to me like there is an unconstrained force and the assembly is either rotating or sliding.
See attached file. How do I make the "ANNOYING" feature thicken?
I'm assuming the issue is because I have a super small curvature issue at the southern most point when I run a check. If that is the issue, how do I fix it?
