I got some warnings and notes regarding connectivity. I tried but failed, can anyone please see the file, I have attached?2.Multi 2 Storied.std
There are some orphan nodes in the model. Deleting them will solve the issue.
You can find the orphan nodes using the below tool.
https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/58739/how-to-check-modelling-error-in-structure