FIX: Nested $IF Statements With $ELSE Fail (84164)

The information in this article applies to:

Microsoft FORTRAN Compiler for MS-DOS 5.1
Microsoft FORTRAN compiler for OS/2 5.1
Microsoft FORTRAN PowerStation for MS-DOS 1.0
Microsoft FORTRAN PowerStation for MS-DOS 1.0a
Microsoft Fortran Powerstation 32 for Windows NT 1.0

This article was previously published under Q84164

SYMPTOMS

Compiling code that contains nested $IF compiler conditions with $ELSE clauses fails to produce the expected result. The compiler issues error:

error F2830: END missing

This error is generated because all of the source code following the $ELSE condition fails to be compiled.

CAUSE

When there is a $ELSE following a $ENDIF and the outer $IF condition is met making the $ELSE condition false the compiler fails to parse for any metacommands following the $ELSE including the $ENDIF that terminates the outer $IF block.

RESOLUTION

Do not use nested $IF metacommands with $ELSE clauses.

STATUS

Microsoft has confirmed this to be a problem in the products listed above. This problem was corrected in Microsoft FORTRAN PowerStation 32, version 4.0.

MORE INFORMATION

The following code reproduces the problem:

Sample code

$define first
      subroutine test
$if defined (first)
$if defined (second)
$endif
$else
$endif
      return
      end

Modification Type:	Major	Last Reviewed:	12/1/2003
Keywords:	kberrmsg kbfix kbLangFortran KB84164