RAM Elements error during design Access Violation

Hello,

I created a model in 3D and was having no issues with it, until I "save as" ed the file to a different name. Now when I try to "design all" members the program force-closes, and when I try to design walls in the concrete module, I get an error stating access violation and the model is no long analyzed. I am not sure how to resolve this issue and would appreciate any input. Please see attached file.

Thanks,90 Percent Design 18 MAR 2019.etz

Diana