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

  ERROR - A program contains an EXIT SUB or SUBEXIT  statement  with  no
  preceding SUB statement.  If the program is a subprogram, supply a SUB
  statement; otherwise, remove the EXIT SUB or SUBEXIT statement.