Hi I am trying to run analysis on a welded frame that has bodies and structural member in it and I keep getting an error when I run the analysis. I keep getting Model is unstable. Restraints may not be adequate. See attached file.
It means that one or more components is loose. One way to troubleshoot is to apply fixtures on components which are suspect, and by a process of elimination you should get it to run and identify the component or components that are loose.
If it is one of the structural members, it might be because they require an enforced contact set between the end joint and the solid mesh surface abutment. I hope this helps.