RAM SS layout error after export from RAM Concept

Hi, 

An usual error has occurred after I exported a new layout of geometry from RAM Concept which results in the graphical errors below. The RAM SS is no longer usable as it freezes when an integrity check is being performed nor it is possible to change any elements as it is not visible from one layout to another. Could you help to troubleshoot what went wrong with the file? 

I've uploaded the model through securefileupload. 

Thanks in advance