Following errror occured while importing model from Perform 3D, SAP2000 and ETAB in workspace.

commond window.
Dot indexing is not supported for variables of this type.
Error in ImportS2K (line 2548)
Error in ImportModel (line 79)
After this at bottom of workspace it says “Model has been closed and workspace has been reinitialized successfully”
Samething happen with other Import options.
Please suggest any corrective major