>>>I only want to cange the records that are currently being displayed on the grid, so it's a subset of the records in the cursor/table. How do I know what records are being displayed?
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>>>>> If this is a logical field, make sure that the value of your checkbox is set to .f.
>>I'm doing this in the init of the grid and also of the checkbox itself, but I'm still getting a data type mismatch.
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>Please post the relevant code and also verify what is the value of the field in the table.

How do I 'post the relevant code' - can I e-mail you the test table and form?

And yes, the field is logical.