Autodesk Robot Structural Analysis

[#1]

When trying to calculate I get many warnings about instability of type 2. What's wrong?

[#2]

Too many releases or too many released d.o.fs?

Part of the model detached from the rest?

[#3]

I have attached the rtd. file

[#4 · Accepted solution]

Part of the model detached from the rest?

Is it a model in from Revit?