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Q150128: BUG: MATHERRQQ() Complex Result Variable Not Used

Article: Q150128
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
========

When you use the MATHERRQQ() run-time subroutine to handle complex number math
errors and you input a return value into either the C8RES or the C16RES function
result variables, members of the MTH$E_INFO data structure, the value is not
returned to the calling function that created the math error.

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

Steps to Reproduce Problem
--------------------------

Build and run the sample code listed below. The program prompts you for the
desired function result when the complex math error is encountered. When you
type in a value for the desired function result, the value is not returned to
clog().

Sample Code
-----------

  ! Compile options needed: /MT

        PROGRAM COMPLX
        COMPLEX(4) c1, c2 /(0.0, 0.0)/ 
        c1 = clog(c2)

        WRITE(*, *) c1
        END PROGRAM COMPLX

        SUBROUTINE MATHERRQQ( name, length, info, retcode)
        USE MSFLIB
        INTEGER(2) length, retcode
        CHARACTER(length) name
        RECORD /MTH$E_INFO/ info
        PRINT *, "Entered MATHERRQQ"
        PRINT *, "Failing function is: ", name
        PRINT *, "Error type is: ", info.errcode
        IF((info.ftype==TY$CMPLX8).OR.(info.ftype==TY$CMPLX16)) THEN
          PRINT *, "Type: COMPLEX"
          PRINT *, "Enter the desired function result: "
          READ(*,*) info.c16res
          retcode = 1
        END IF
        END

Additional query words: 4.00

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

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