unknown or unrecognized I/O target

    Facility: EFI$CP, The OpenVMS EFI Partition Control Program

    Explanation: an internal error has been detected, and the type of
    target for an I/O operation cannot be determined.

    User Action: An internal error has been detected. Please contact
    support. If this error can be reproduced with a specific command
    or a specific command sequence, please provide the reproducer.