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Q149478: BUG: F1001 Error /4fps1 and /Ox with Exponent Calculation

Article: Q149478
Product(s): Microsoft Fortran Compiler
Version(s): 4.0
Operating System(s): 
Keyword(s): kbFortranPS kbLangFortrankbbuglist
Last Modified: 02-NOV-1999

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The information in this article applies to:

- Microsoft Fortran PowerStation for Windows 95 and Windows NT, version 4.0 
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SYMPTOMS
========

Using the /4fps1 and /Ox compiler options together and performing a calculation
involving raising an integer constant to the power of a negated integer variable
causes the following internal compiler error:

  fatal error F1001: INTERNAL COMPILER ERROR
  (compiler file '..\..\\P2\confold.c', line 296)

  Please choose the Technical Support command on the Developer Studio Help menu,
  or open the Technical Support help file for more information

RESOLUTION
==========

Make the INTEGER constant part a REAL constant.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. We are researching this problem and will post new
information here in the Microsoft Knowledge Base as it becomes available.

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

Sample Code to Illustrate Problem
---------------------------------

  ! Compile options needed: /4fps1 /Ox

        i = 6
        test = 10**(-i)    ! Comment this line for workaround
  !      test = 10.0**(-i) ! Uncomment this line for workaround
        print *, test
        end

Additional query words: 4.00

======================================================================
Keywords          : kbFortranPS kbLangFortran kbbuglist
Technology        : kbAudDeveloper kbPTProdChange kbFortranSearch kbFORTRANPower400NT
Version           : :4.0

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