Having difficulty copying feature classes from arcsde to a file geodatabase.

Used arcmap to import xml of data schema only from arcsde into a file geodatabase. Using esri geodatabase (ArcSDE Geodb) reader to esri geodatabase (file geodb). receiving error message:

An error occurred while attempting to open an insert cursor on the table 'Beacons'.

The error number from ArcObjects is: '-2147216556'.

The error message from ArcObjects is: {Objects in this class cannot be updated outside an edit session [Beacons]}