It was mentioned previously that there will be a service pack for fixing the problem regarding not being able to open Autocad 2013 in Arcgis 10.1. Have not been able to locate this service pack.
I don't have a date for you. All I can say is that it will be in the upcoming 10.2 release of ArcGIS desktop.
I'm having trouble trying to open this CAD file. I've tried getting the engineer to save it out as both DXF and DWG version 2000 and still have no luck. It opens fine in TrueView and AutoCAD MAP but when I try to open it in ArcGIS it just spins and lock up the program. Any ideas on what is going on?