OVF export fails with timeout error

When I try to export a VM to OVF, it fails with error "Failed to Export Virtual Machine: The Operation has Timed Out."  The event long shows that the task was cancelled by a user.  I have tried this from 2 different workstations and the vcenter console with no change in symptoms.  I have also tried different VMs with no change.  Any help would be greatly appreciated.

Thanks,

DLE