no read access to address address_value

    Facility: DEBUG, VMS Debugger

    Explanation: The address you specified cannot be read by the
    debugger. Therefore the operation you requested cannot be
    performed.

    User Action: Verify that the address being read is correct.
    One way to do this is to use EVALUATE to find the address of
    the specified symbol, or to EXAMINE the descriptor to see if it
    specifies a valid address.