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Q40877: With QB /L, "Far Heap Corrupt" After Deleting Module

Article: Q40877
Product(s): See article
Version(s): 4.50
Operating System(s): MS-DOS
Keyword(s): ENDUSER | BUGLIST4.50 SR# S881220-39 | mspl13_basic
Last Modified: 7-FEB-1989

The following key sequence causes a "Far Heap Corrupt" error, aborting
the QB.EXE Version 4.50 editor and returning you back to DOS:

1. Start QB with /L, loading any quick library.

2. Load a program that uses graphics and has a subprogram.

3. Press CTRL+F10 to enable the full screen.

4. Run the program (SHIFT+F5, or Start Program from the Run menu).

5. Press CTRL+BREAK to stop execution of the program.

6. Press F2 (View Subs) and select a subprogram.

7. Choose the Delete option.

8. A window opens asking if you want to delete the indicated
   subprogram; select OK.

9. A window opens telling you that the program has to
   be restarted after the indicated edit; select OK.

The screen will then go blank with the message "Far Heap Corrupt"
at the top.

Microsoft has confirmed this to be a problem in Version 4.50. We are
researching this problem and will post new information as it becomes
available.

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