I fully agree that pointer should never be NULL, however, crashing is not a good idea. I think contents of a pointer may be NULL not a pointer. In my opinion it indicates that not proper homework (or groundwork)is done before coding. I do check for NULL pointers but only in debug version and to eliminate any such occurrence.

Thanks XMen, I do not have any null cell but the error takes place. In fact in the database no field is allowed to be null. Can you help?

I am working on VS2005,having a DataGridView Control bound to a data source. Out of 13 coulums in the grid, 3 columns are DataGridViewComboBoxColumn and two Text Columns have WrapMode=True. I found that add/update etc. work fine, but since the wrpped text was not properly visible, I set the AutoSizeRowsMode = DisplayedCells, and I started getting following error DataGrid Cell value is not valid The error repeats for all the ComboBox type Cells and contents are not displayed. Once I restore the AutoSizeRowsMode=none the error disappears? Any help Ashok