Saving DWG files

Is anyone having problems with saving multisheet drawings to DWG files if you use a mapping file. I can save DWG files if I don't use a mapping file but If I try to either use an existing mapping file or have the mapping dialog come up every time, SW hangs up like it is waiting for me to input something. This works fine in 2013

SolidworksSolidworks 2014 Beta