DOCUMENT:Q112057  24-MAR-2000  [fortran]
TITLE   :FIX: F1001 in regasg.c with Adjustable Sized COMPLEX and /4Yb
PRODUCT :Microsoft Fortran Compiler
PROD/VER::1.0,1.0a
OPER/SYS:
KEYWORDS:

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft FORTRAN PowerStation for MS-DOS, versions 1.0, 1.0a 
-------------------------------------------------------------------------------

SYMPTOMS
========

Compiling a routine (that uses adjustable sized COMPLEX arrays in an expression
with a COMPLEX constant) with the /4Yb (or $debug) option may produce the
following error with FORTRAN PowerStation 1.0:

   fatal error F1001: INTERNAL COMPILER ERROR
   (compiler file '@(#)regasg.c:1.25', line 451)
   Contact Microsoft Product Support Services

Using FORTRAN PowerStation 1.0a, the following error may be produced:

   fatal error F1001: INTERNAL COMPILER ERROR
   (compiler file '@(#)regasg.c:1.25', line 453)
   Contact Microsoft Product Support Services

RESOLUTION
==========

Either use the CMPLX or DCMPLX intrinsic function on the COMPLEX constant, or do
not compile with extended error handling.

STATUS
======

Microsoft has confirmed this to be a problem in FORTRAN PowerStation versions
1.0 and 1.0a for MS-DOS. This problem was corrected in FORTRAN PowerStation 32.

MORE INFORMATION
================

To demonstrate the problem, compile the sample code below with the Microsoft
FORTRAN PowerStation:

Sample Code #1
--------------

   $debug
         SUBROUTINE FILTER(FFT1,FFT2,N)
         complex fft1(n),fft2(n)
         fft1(n)=(0,1)*fft2(n)
         return
         end

The internal compiler error can be alleviated by using the CMPLX intrinsic
function as shown in the example below:

Sample Code #2
--------------

   $debug
         SUBROUTINE FILTER(FFT1,FFT2,N)
         complex fft1(n),fft2(n)
         fft1(n)=CMPLX(0,1)*fft2(n)
         return
         end

Additional query words: 1.00 1.00a

======================================================================
Keywords          :  
Technology        : kbAudDeveloper kbFortranSearch kbZNotKeyword3 kbFORTRANPower100DOS kbFORTRANPower100aDOS
Version           : :1.0,1.0a
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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