The error happens during reconfig phase:
2015-11-03T14:24:55.049-05:00 error vmware-converter-agent[10272] [Originator@6876 sub=task-6] [BaseDiskSetComputer::AnalyzeErrorAndThrow] Error occurred when opening disk set, MNTAPI_ERROR = 176 MNTAPI errorType = 0, errorCode = 11
and error 11 means: "An attempt was made to load a program with an incorrect format." and probably this error is about registry hive format.
You can try to "configure" only new VM with Converter
HTH