unknown file header mapping pointer format detected Facility: EFI$CP, The OpenVMS EFI Partition Control Program Explanation: A mapping pointer in the file header is using an unrecognized or unsupported mapping pointer format. User Action: There is no particular recovery for this error, if this is the most current version of this tool. This version of the tool is incompatible with the OpenVMS file header format, or there is a corruption within the file header, or other similar error.