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

  Name or account now exists (ERR=16)

  The program attempted to RENAME a file  and  a  file  with  that  name
  already  exists.   Use the KILL statement to erase the old file before
  using RENAME to name the new file or use a different name.