Hi,
In my previous test, it involve lnRow. However, I have change to use GRIDHIGHLIGHTER class. Therefore the job of handling record no and highlight is taken by this class and I just set the property of backcolor/forecolor from this class.

Although, but give me the same result, which will generate DYNAMIC... expression is invalid after the the program run a period of time.

For your info, it is a POS front end, and the major task user do in this UI is scan/key in barcode, record added to grid, press function key to settle transaction, grid refresh and repeat what I mention as above.

The error occured when user scan/key in the barcode but not the grid refresh after settlement.

Sometime, I scan more than 100 item into grid without problem, but sometime error occured even just 3-5 records added.

Any suggestions?

Thank you