Library /sys$common/syshlp/basichelp.hlb Run time errors, TAPRECNOT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Tape records not ANSI (ERR=128)

  The records in the magtape you accessed are neither ANSI D nor ANSI  F
  format.   Determine  the  magtape's  format  by  mounting  it with the
  /FOREIGN qualifier and using the DUMP DCL command.