Element/node IDs changing randomly after model modification

[cyrusrezvanifar]

Hello,

I have noticed this issue in FEBio Studio and previously in PreView: when I remove a part from an object which consists of multiple parts with BC's and contacts already defined, it seems that all element/node IDs are changing randomly and are not held constant. As a result, removing a part would affect all the BC's, contacts, and rigid constraints for all other parts, and would require defining all those model features from scratch. Am I missing a point here or is it actually a bug in the software?

Thanks!

[maas]

Hi,

This is indeed an issue in the software and there is not really a solution to this. When working with "editable meshes", we always recommend to make any changes to the mesh before applying any boundary conditions.

I have thought about fixing this, but the issue is complex and there is no way to implement a solution that would prevent similar issues in every situation. At this point, I'm thinking about preventing users to make any changes to a mesh that has boundary conditions applied to it, unless they understand the consequences. (Again, this would only apply to "editable meshes" and not to primitives or CAD objects.)

Cheers,

Steve