000496: Table is being edited.

Description

Schema changes, such as adding or removing a field from a table, cannot occur while the data is being edited. The tool or the option used does not support operation in an edit session.

Solution

Complete your edits; then run the tool. On the Edit tab, in the Manage Edits group, click Save or Discard to save or discard your edits, respectively. See the tool's help for more information.