FIX: GP Fault When Change RecordSource of a Column in a Grid (141950)


The information in this article applies to:

  • Microsoft Visual FoxPro for Windows 3.0
This article was previously published under Q141950

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 has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. This has been corrected in Visual FoxPro 6.0.

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.
The GP fault occurs with details similar to the following information: 
   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
Modification Type:MinorLast Reviewed:3/14/2005
Keywords:kbBug kbvfp600fix KB141950
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