Hi Cetin,

>>But why, isn't that message a result of structural change attempt.

No. I'm not attempting to modify the structure of any table or cursor. The form's pretty simple - a buffered table in the DE, grid control sources set at design time.

I'm just selecting a row in the grid and changing a value for that record using a control outside the grid. After two or three of these changes I get the error message...

Regards,
Viv