Michael,<br /><br />Wouldn't the current implementation ASSERT if there are different plug-in cards by the same vendor using the same GUID in their FMP?&nbsp; They are managing different hardware and have no knowledge of the existence of the other FMP instance.&nbsp; Each FMP is only aware of the specific device on whose handle they are installed.&nbsp; If they use FW image descriptors below version 2 (or they cannot determine a unique HW instance), this would always be 0.&nbsp; Why would we want to ASSERT in this case?&nbsp; What error condition is being caught?<br /><br />Thanks,<br />SWig