>I'm using VFP 7.0
>

>My code is crashing on the line:
>if ll       & error 11 : Function argument value, type, or count is invalid.
>

>
>When tracing through my code the locals window shows:
>ll = .F.
>but when I hang the cursor over ll in the trace window it shows:
>ll = "1053104173 "

If the Locals window is showing a different value to the tool tip text in the trace window, then you are looking at two different variables and given the absolutely appalling variable name - my suggestion is to change your fonts to FoxFont and see how many variations of ll l1 1l ii il i1 you have.