Converter fails at 1% with non-specific error message

I'm attempting to covert several physical Server 2003 machines to VMware ESX.  I get the same result with converter stand-a-lone or the plug in.

I can sucessfully create and submit the job.
It looks like the converter files are being copied to the machine wich is being converted.
It then looks like the a snap-shot is taken and right after at 1% the conversion fails with a non-descript error message.  Below are the lines taken from the log file.

I saw some posts suggesting this might be a ports issue and had our network team open ports 443 and 902.
That wasn't it, the next job I submitted failed in the same way.  I'v tried other servers and specified IP addresses instead of host names.

Any ideas as to what the issue is or how to troubleshoot this issue?

Thanks

[2013-02-26 12:37:05.429 08508 error 'App'] [task,344] [LRO] Unexpected Exception: converter.fault.CloneFault
[2013-02-26 12:37:05.430 08508 info 'App'] [task,373] [task-55] -- ERROR -- Convert: converter.fault.CloneFault
(converter.fault.CloneFault) {
   dynamicType = <unset>,
   faultCause = (vmodl.MethodFault) null,
   description = "Unknown exception",
   msg = "",