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

  ERROR - A new variable was named in an immediate mode statement  after
  a  STOP,  for  example,  PRINT B after a STOP in a program that has no
  variable named B.  You cannot create new variables in  immediate  mode
  after a STOP statement.