Hi Naomi,

Thank's. Maybe your approach is the sounder one, although I can't offhand say why. I'll certainly give it a try.

As to the try...catch, my thinking was that, if the replace, for whatever reason, were to cause an error, I don't want the whole app to fail.

In the meantime I've narrowed the issue down: the enter on the checkbox for some reason causes the grids columncount to be set to zero. Why, I don't know.

>>I have a checkbox in a grid with this code in interactivechange method:
>>
>>TRY
>> IF THIS.VALUE = .T. AND InventoryByRequisition.TaxCredit = .T.
>> REPLACE InventoryByRequisition.TaxCredit WITH .F.
>> ENDIF
>>CATCH TO oEx
>> oEx = NULL
>>ENDTRY
>>
>>When I check / uncheck by using the mouse or the spacebar everything works fine, but pressing the Enter key clears the grid and I haven't found a way to to debug or recover from this behavior.
>>
>>There is no custom code in the when or valid section of the checkbox.
>>
>>TIA
>
>Unrelated info, but I prefer to write
>

>this.value = this.value
>
>llValue  = this.value
>
>if llValue and InventoryByRequisition.TaxCredit 
>   replace TaxCredit with .f. in InventoryByRequisition
>endif

>
>Also why do you need try/catch here - do you have triggers you expect to fail?