BUG: D2030 or DX1020 Error on Assumed-Size Array Expressions

 Last reviewed: July 13, 1995
Article ID: Q111235
The information in this article applies to:
  • Microsoft FORTRAN PowerStation for MS-DOS, version 1.0 and 1.0a
  • Microsoft FORTRAN PowerStation 32 for Windows NT, version 1.0

SYMPTOMS

Compiling a file that contains an assumed-size array expression may produce the following error under Windows NT: 

   Command Line Error D2030: INTERNAL COMPILER ERROR
Under straight MS-DOS, the following error may be produced during compilation: 

   DOSXNT : fatal error DX1020: unhandled exception: Page fault;
Under the Windows MS-DOS box, no error is produced. The appropriate errors for this situation are: 

   error F2652: array expression: cannot be assumed-size array
   error F2564: incompatible types in assignment

CAUSE

Because the size of an assumed-sized array is not known at compile time, you cannot use an assumed-size array in an array expression.

RESOLUTION

Do not use assumed-size arrays in array expressions.

STATUS

Microsoft has confirmed this to be a problem in FORTRAN PowerStation 32 for Windows NT version 1.0 and MS-DOS version 1.0 and 1.0a. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

The following sample illustrates the problem:

Sample Code

c Compile options needed: none c 

      INTEGER*2 FUNCTION GETSP(SPVALU)
      INTEGER*2       COMBUF
      INTEGER*2       SPVALU(*)
      SPVALU = COMBUF  !  Array expression sets each element to COMBUF
      END

Additional reference words: 1.00 1.00a ICE array operations
KBCategory: kbtool kbbuglist kberrmsg
KBSubcategory: FL32Iss

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Last reviewed: July 13, 1995
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