Hello, I have some questions regarding SolidWorks Simulation 2025 for truss analysis.

I recently tried running some truss simulations. I had previously run them in version 2024 without any issues, but now I'm getting some errors.

When I draw my truss and create weldment structural members, I begin my static analysis. From the cut list, I change all the solids to truss members. I define my material, fixtures, loads, and mesh to then run the simulation. Here, I get a message that the solver has detected that the study may be unstable and a question: should we stop solving and display the solids without constraints?

It then shows me that the solids are not completely restricted and does not let me run the analysis.

I'm not sure if this new version (2025) requires a different restriction than before. I don't know if anyone else has experienced simulations that previously ran fine in the 2024 version now displaying issues. If so, has anyone been able to resolve it correctly?

Truss: 

Previously this was what I got with version 2024:

Thank you for your help!!