>What the heck does that mean ?
>
>

*Grid.valid
>*...
>	lcRecSource = .recordsource
>	.recordsource = ""
>	GO .nLastValidRec in (lcRecSource)
>	.recordsource = lcRecSource && Error occurs here
>*...
>

Absolutely there are more than one tables open and current workarea has the correct table (lcRecsource).
>TIA
>Cetin

A random, non-replicable error? I tried your code and it works without error for me. I did change the 3rd line to GO recno(lcRecSource) + 50 in (lcRecSource)

I even stuck a SELECT 0 before the GO line and it still worked.