■ An ELSE clause appears without a corresponding IF.
  Sometimes this error is caused by incorrectly nested IF
  statements.
 
■ Possible solutions:
 
  • Insert the IF keyword at the beginning of the IF...END IF
    structure.
 
  • Check other control structures within the IF...END IF
    block to verify that they are correctly matched. For
    example, a nested IF block without a matching END IF
    inside the outer IF...END IF block may generate this
    error.
 
■ If you need additional help, move the cursor to a keyword
  and press F1 to open the Help window.