Q60857: CodeView Does Not Watch Local Variables in Subprogram

Article: Q60857
Product(s): See article
Version(s): 4.00
Operating System(s): MS-DOS
Keyword(s): ENDUSER | buglist4.00 fixlist4.00b fixlist4.50 B_BasicCom | mspl13_basic
Last Modified: 19-APR-1990

CodeView does not display correct values for local variables in
SUBprograms in QuickBASIC Version 4.00. With local individual
(nonarray) variables, the watch always displays 0 (or "" for strings).
Adding a watch on a local array element causes CodeView to display the
message "Too many array bounds given." This is a problem with the
BC.EXE 4.00 compiler, not with CodeView.

Microsoft has confirmed this to be problem in Microsoft QuickBASIC
Version 4.00 for MS-DOS. This problem was corrected in Microsoft
QuickBASIC Versions 4.00b and 4.50 for MS-DOS, Microsoft BASIC
Compiler Versions 6.00 and 6.00b for MS-DOS and OS/2 (fixlist6.00,
fixlist6.00b), and Microsoft BASIC Professional Development System
(PDS) Version 7.00 (fixlist7.00).

Code Example
------------

The following code example demonstrates the problems with watching a
local variable in a SUB in CodeView with QuickBASIC 4.00. Use the
following steps to reproduce this problem:

1. Compile the program with /Zi, and link with /CO with the BC.EXE
   4.00 compiler. You cannot do this from within the QuickBASIC
   environment.

2. Start CodeView as follows:

      CV localv.exe

3. Step through the program using the F8 key until you are inside the
   SUBprogram.

4. Choose Add Watch from the Watch menu (or press CTRL+W). Type the
   name of the variable to be watched in the dialog box.

5. Continue to step through the subprogram with the F8 key. The
   variables being watched will not change in the watch window.

Code Example
------------

   'Compile and link lines:
   '
   ' BC /Zi localcv;
   ' LINK /CO localcv;
   CALL test(1)
   END

   SUB test (param%)                 'Watch param% displays correctly
   DIM array%(10)                    'Watch array%(10) -> Too many
                                     'bounds
   locali% = 10                      'Watch locali% displays 0
   PRINT param%, locali%, array%(10) 'These print correctly
   END SUB

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