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

  Not at end of file (ERR=149)

  The program attempted a PUT operation on a sequential file before  the
  last  record  or  without  opening  the file for WRITE access.  OPEN a
  sequential file with ACCESS APPEND or OPEN the file with ACCESS WRITE.