AutoISOGEN Error when output format set to Smart DWG

PSDS XM v08.09.04.52 Nov 2009

Otion Switch 71 (PLOTFILE / BACKING SHEET FORMAT)

If I run IsoGen with output format set to .DXF (ASCI) I get a good output.

If I change the output format to Smart DWG, I get an output, but if I try to open the file, AutoCAD says: Drawing file is not valid.

Alias.mes says:

 ***** POD Error(s) ***** Unable to load XML document : R:\15-PSDS\PISOGEN\FINAL\DRAWINGS\Test-5.XML             Error Code : 800c0007, Description : No data is available for the requested resource.

            Line/Position : 0/0

Any suggestions?