Microsoft KB Archive/150128

= BUG: MATHERRQQ Complex Result Variable Not Used =

PSS ID Number: 150128

Article Last Modified on 11/2/1999

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The information in this article applies to:


 * Microsoft Fortran PowerStation for Windows 95 and Windows NT 4.0

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This article was previously published under Q150128



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.



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

Keywords: kbLangFortran KB150128

Technology: kbAudDeveloper kbFORTRANPower400NT kbFortranSearch kbZNotKeyword8

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