Source: eDirectory
Explanation: An operation has been requested at a time when the database must force a checkpoint.
Possible Cause: An error has occurred (for example, out-of-disk) that requires the database to flush all dirty cache buffers to disk.
Action: Retry the operation once the checkpoint has completed. Because this error is frequently the result of an out-of-disk condition, verify that free disk space is available on the volumes hosting the database and RFL files.