rev 405, getting new error

I'm running InstaDMG through InstaUp2Date using a catalog file that's always worked in the past, and now I get this error message. 16:11:28 ###### InstaDMG build initiated ###### InstaDMG version 1.6rc1 (svn revision: 388) Host OS: Mac OS X Server 10.6.4 Host Hardware: MacPro4,1 .dmg Output file name: FacStaff.dmg Output disk name: Macintosh HD is not recognized by the Apple installer ###### Traceback (most recent call last): File "./instaUp2Date.py", line 716, in main() File "./instaUp2Date.py", line 705, in main thisController.runInstaDMG(scratchFolder=options.instadmgScratchFolder, outputFolder=options.instadmgOutputFolder) File "./instaUp2Date.py", line 472, in runInstaDMG raise RuntimeError('InstaDMG process did not run sucessfully') RuntimeError: InstaDMG process did not run sucessfully Any ideas?