I see the same issue and it is the same on the internal daily software builds from last week so we have an issue with this file. My guess is that we have seen this before - I think it relates to Splined Leader Lines or something like that - I thought that we had addressed it but evidently not.
DO you have Civil 3D or AutoCAD in house that you can open this with - if so you may want to open it and find SPlined Leaders and not select those and re write the DWG file and see if that works.
In the meantime I have forwarded to development to take a look - if they can get the file to open - I will have them writea VCL file out and I will forward to you - failing that I can reload my AutoCAD License at the office tomorrow and try to find out what the issue is.
Alan