FIX: Erroneous F6099: Integer Overflow with $DEBUG

MS-DOS    | OS/2

The information in this article applies to:

• Microsoft FORTRAN for MS-DOS, versions 5.0 and 5.1
• Microsoft FORTRAN for OS/2, versions 5.0 and 5.1

SYMPTOMS

The code below erroneously produces the following error when compiled with $DEBUG or /4Yb:

   run-time error F6099: $DEBUG
   - INTEGER overflow

RESOLUTION

Any one of the following will correct the error in the sample code:

1. Comment out the common blocks.

   -or-

2. Change the 16000s to 15999.

   -or-

3. Remove one parameter in the write statement.

   -or-

4. Substitute a 1 in place of ibeta in the WRITE statement.

   -or-

5. Reduce the 8600s to smaller numbers.

   -or-

6. Remove the $storage command.

   -or-

7. Break the write statement into multiple write statements.

STATUS

Microsoft has confirmed this to be a bug in the products listed above. This problem was corrected in FORTRAN PowerStation, version 1.0.

MORE INFORMATION

The following code can be used to demonstrate the problem.

Sample code

$debug $storage:2

        dimension datsp1(16000), datsp2(16000)
        real*4 datsp1,datsp2

        common /dd1/ datsp1
        common /dd2/ datsp2

        itabl=8600
        iwyn=8600
        idar=4321
        ia=1
        icarr=4615
        ih=295
        ixpxi=199
        iy=197
        ise=193
        ibeta=1

        write(*,*) datsp1(ibeta),datsp1(ise),datsp1(iy),
     &  datsp1(ixpxi), datsp1(ih), datsp1(icarr), datsp2(ia),
     &  datsp2(idar),datsp2(iwyn),datsp2(itabl)
        end