Update
I have found that there was a file in the app install directory that needed to be modified to allow Javascript (vco) to read the local file system. What now happens is that the workflow now just returns false?
It appears to me that a file is created, vmwareX where x is an integer number and then deletes it as per the output attached to the original posting.
Guest Operating System is Windows Server 2008 R2 SP1.
??? Any help?