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"The selected cells are read-only" error on Custom Field when trying to insert in Datasheet mode

Posted By:      Posted Date: October 25, 2010    Points: 0   Category :SharePoint
I have a custom field that works completely fine. Yesterday our QA team found out that when trying to insert in Datasheet format, the error "The selected cells are read-only" was thrown. Any ideas? I tried passing the following property to my fldtypes_field.xml file:

    <Field Name="ReadOnly">FALSE</Field>

No luck.
Victor Palma

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