>This code breaks right before the wait window '3 '+alias() line with the error:
>'Function argument value, type, or count is invalid.'
>
>Doing a getfldstate before I click my action button shows:
>
>34444444444444444444444
>
>
>(in data environment, table customers is open, view custupdate is open with records for writing back onto and a table called custnums is open which is not related to this function)
>
>?!
>
>
>CursorSetProp('buffering',1,'Customers')
> select CustUpdate
> wait window '1 '+alias()
>lnFieldCount = AFIELDS(laFields,'CustUpdate')
>FOR nNothing = 1 TO lnFieldCount
> wait window '2 '+alias()
> DO CASE
> CASE GETFLDSTATE(nNothing,'CustUpdate') = 3 &&Breaks Here
> wait window '3 '+alias()
> SETFLDSTATE(nNothing,1,'CustUpdate')
> CASE GETFLDSTATE(nNothing,'CustUpdate') = 4
> SETFLDSTATE(nNothing,2,'CustUpdate')
> endcase
>ENDFOR

That doesn't make any sense. What does GETFLDSTATE(nNothing,'CustUpdate') show in the watch window in the debugger at ht time that the code breaks? How about nNothing?