... are correct! I am calling upstable while the Brw ::hWnd is 0 May I suggest you change wBrowse nRowCount method as follows to prevent other users wasting time on the same issue METHOD nRowCount() INLINE ; if(::hWnd > 0, nWRows( ::hWnd, 0, If( ::oFont != nil, ::oFont:hFont, 0 ) ) - 1, 0) Thanks ...