>I have a cursor that I want to ZAP, since it's used as RecordSource of a grid.
>
>However, when I call ZAP, I get error #18 -- "Line too long".
>
>Any guesses on the possible cause?

Debug it... what was the line that gave the error? What did message(1) return?

I can imagine any number of filter expressions, index for expressions, grid's dynamic* properties etc evaluating into something that doesn't work as advertised when there's no record.