Microsoft KB Archive/102695

= FIX: F2559, DX1020 From Illegal Array Bound, -4Yb, and -4Ys =

PSS ID Number: 102695

Article Last Modified on 3/24/2000

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The information in this article applies to:


 * Microsoft FORTRAN PowerStation for MS-DOS 1.0

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This article was previously published under Q102695



SYMPTOMS
An attempt to compile an application may fail and Microsoft FORTRAN PowerStation may generate the following messages:

error F2559: array bound used illegal variable

DOSXNT : fatal error DX1020: unhandled exception:

General protection fault



CAUSE
The application declares an array using an initialized INTEGER variable as an array bound and refers to that array using an INTEGER as a subscript. The compile command line includes both the -4Yb and -4Ys option switches.

The General Protection Fault occurs because the array has an illegal array bound.



RESOLUTION
Modify the source code to define the array bound in a PARAMETER statement before using it in the array declaration or declare the array using an integer constant.



STATUS
Microsoft has confirmed this to be a problem in FORTRAN PowerStation version 1.0 for MS-DOS. This problem has been resolved with FORTRAN PowerStation maintenance release version 1.0a for MS-DOS.



MORE INFORMATION
The following code example demonstrates this problem:

Sample Code 1
C Compiler options needed: -4Yb -4Ys

real x(n) i = 1 x(i) = 1.0 end The following code example demonstrates the correct method to declare an array in this manner:

Sample Code 2
C Compiler options needed: -4Yb -4Ys

parameter (n = 10) real x(n) i = 1 x(i) = 1.0 end FORTRAN PowerStation version 1.0 can be differentiated from the maintenance release version 1.0a by invoking the linker. Typing link32 | more from \F32\BIN directory will show version 2.8 for FORTRAN PowerStation version 1.0, and it will show version 1.0f for the maintenance release version 1.0a.

Additional query words: 1.00 buglist1.00 fixlist1.00a

Keywords: kbbug KB102695

Technology: kbAudDeveloper kbFORTRANPower100DOS kbFortranSearch kbZNotKeyword3

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