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

  ERROR - The program contains an IF-THEN-ELSE statement within a  block
  (for  example, a FOR-NEXT, SELECT-CASE, or WHILE block) and the end of
  the  block  was  reached  before  the   IF-THEN-ELSE   statement   was
  terminated.   Check  program  logic to be sure IF-THEN-ELSE statements
  are terminated with a line number or an END IF  statement  before  the
  end of the block.