Sap2000 Time History Analysis

[apiderit24]

I am trying to model a frame attached to a shaking table. The table is attached to a motor and pulley system that moves the table back and forth in a sine wave. I am trying to model this in Sap2000 and am having trouble viewing the results. I have the frame attached to plates at the bottom and the plates are only restricted from rotation and movement in and I am trying to apply a function to the plate at the bottom of the frame. When I run the analysis and try to view the deformed shape, I am getting an error message reading, "Unable to complete operation 'showdeformedshape' error 6 Please save file under a different name." Could the problem be that it is not restrained from movement in the translational x direction? Also, I am wondering where the function is being applied in the time history analysis.