Unable to verify external routine <str>.
  Image name is <str>.
  Entry point is <str>.

  Explanation:  RMU cannot verify that the external routine can be
  activated.   This  message  will  be  displayed  if RMU has been
  installed with privileges (this is  the  default  configuration)
  and  either  of  the following conditions exists:  1.  The image
  for the external routine can be located via /SYSTEM logicals but
  is  not  installed  with the VMS INSTALL utility.  2.  The image
  for the external routine can be located but not via only /SYSTEM
  logicals.

  User Action:  Specify the image location in the external routine
  using  system- wide executive-mode logical names and install the
  image as a known image.  Alternately, retry the verify operation
  using a non privileged RMU.