I'm with a problem here, that when i try to change a material from a frame member, i got the error below:
[WARNING] Frame Generator: Errors occurred while attempting to change frame member(s). [WARNING] Problems occurred during changing Frame Member(s) [ERROR] A change could not be completed. The reason for the failure is unknown. Please retry.
The structure that i'm trying to change, was created in IV 2012 SP1, and now I'm editing it in IV 2013.
All the pieces of this project were converted to the new version, and the only big difference from 2012 in this case i think that is the materials library, that I created a new one and set on project as default.
The strange, is that if I enter frame by frame and go to iProperties>Physicals, there i can change the material normally (but with a big wate of time ofc).