PRB: GP Fault When Change RecordSource of a Column in a Grid

• Microsoft Visual FoxPro for Windows, version 3.0

SYMPTOMS

A general protection (GP) fault occurs when you change the RecordSource property of a column in a grid.

CAUSE

The GP fault may be caused by opening a table in area 256 or greater. For example:

USE TEST IN SELECT(1)

This uses the last available work area, usually 32767.

STATUS

Microsoft is researching this behavior and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

Steps to Reproduce Behavior

1. Create a free table called Test with two fields named First and Last. Make both fields Character(10). Enter a couple of rows of sample data.

2. Create a blank form.

3. Add a grid to your form and change its ColumnCount property to 1.

4. Add a command button to your form, and place the following code in its Click event:

   THISFORM.Grid1.Column1.ControlSource = "last"

5. Add the following code to the Init event of your form:

   USE TEST IN 256 THISFORM.Grid1.RecordSource = "test"

6. Run the form, and click the command button.

   VFP caused an invalid page fault in
   module KERNEL32.DLL at 0137:bff858c0.
   Registers:
   EAX=7fd89e61 CS=0137 EIP=bff858c0 EFLGS=00010202
   EBX=009dfe28 SS=013f ESP=008e0000 EBP=008e03bc
   ECX=00000000 DS=013f ESI=815958c0 FS=3be7
   EDX=c001ebf0 ES=013f EDI=815a8f08 GS=0000
   Bytes at CS:EIP:
   55 a1 78 c2 fb bf 8b ec 83 ec 70 8b 08 53 56 89
   Stack dump:
   ffecbad7 008e0030 008e0014 0000000e
   00000004 c0000005 00000000 00000000
   7fd89e61 00000002 00000000 7fd89e61
   0001001f 00000000 00000000 00000000