Error after deleting cached OS image

Ok, I am new to this. We wanted to start fresh having run successfully a number of package creations with Instadmg (we had bypassed instaUp2Date for the moment). I deleted the cached OS images and I am now getting the errors ash-3.2# sudo ./instadmg.bash -s -n "Mac HD" -m LionTest214:18:35 ###### InstaDMG build initiated ###### InstaDMG version 1.6rc1 (svn revision: 425) Host OS: Mac OS X Server 10.7.1 Host Hardware: Macmini5,3 Output file name: LionTest2 Output disk name: Mac HD 14:18:35 ###### Finding main MacOS X installer disk ###### Found primary OS installer disk: /Users/admin/instadmg/InstallerFiles/BaseOS/InstallESD.dmg 14:18:35 ###### Looking for a Cached Image ###### No cached image found 14:18:35 ###### Mounting Mac OS X installer image ###### ###### Unable to mount : Traceback (most recent call last): File "AddOns/InstaUp2Date/Resources/dmgMountHelper.py", line 72, in currentMountPoints = dmgManager.getDMGMountPoints(imageToMount) File "/Users/admin/instadmg/AddOns/InstaUp2Date/Resources/volumeManager.py", line 377, in getDMGMountPoints if os.path.samefile(thisDMG['image-path'], dmgFilePath): File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/posixpath.py", line 153, in samefile s1 = os.stat(f1) OSError: [Errno 2] No such file or directory: '/Users/admin/InstaDMG/Caches/BaseImageCache/D8E0A028.dmg' ###### 14:18:36 ###### Cleaning up ###### Ejecting images The file it is looking for was deleted (not in the trash). I thought it would be building from InstallESD.dmg if it could not find a cached image and hence rebuild the cached image. I tried with the -v option but that did not help. Any help would be appreciated Thanks