"An error occurred during the conversion: 'Unknown exception'",

We're using Vcenter to P2V some of our servers. Most have worked, but the ones that fail, fail with a description that is not helpful at all.

mostRecentError = (converter.fault.CloneFault) {

--> dynamicType = <unset>,

--> faultCause = (vmodl.MethodFault) null,

--> description = "Unknown exception",

--> msg = "An error occurred during the conversion: 'Unknown exception'",

--> },

--> numConsecutiveErrors = 1,

We're tried several different ways of cloning including matching the hardware, not thin provisioning, setting permissions, using a domain admin account and still we get this error.

has anyone else had this error and figured out a solution?

Thanks.