Hi seasdes,
We have the file and are able to reproduce the problem in this file, but not when using the same REVCLOUD command in a new progeCAD DWG file.
We have tried different ARC and DIMSCALE settings in progeCAD but the behaviour you describe doesn't seem to change, so there must be some yet undocumented factor at play here.
We did notice that the initial extents of the drawing you have sent is zoomed out 40000 drawing units across, but DIMSCALE remained unchanged. I'm not sure what the intentions were with that..
Are you being sent these files? May I ask what CAD software the file you sent was ORIGINALLY created in? NEW drawings in progeCAD 2010 start out differently, we suspect a second CAD system (perhaps a legacy system) at play here.