When trying to send a Tracked Object to production I get:

:: ********** START [Commit Phase]
2006/10/25 14:20:21 :: *  Committing objects to server : [SentinelServerXIPComponent]
2006/10/25 14:20:22 :: *  FATAL  : An internal Engine error has occured
2006/10/25 14:20:22 :: *  REASON : SQL Error on FrontEnd server for the Tracking Object 16cb597c-6423-11db-9ec3-005056c00008
2006/10/25 14:20:22 :: ********** END

Here are the points that can be checked:
  - if the Composer database tablespaces have enough free space;
  - if the Composer database is up to date, for the core server and each Enabler , by using xdbm;
  - if the java used by the Composer Server is the same version as the one used by the Composer Client;
  - if the Composer Server and Composer Client and the Enablers have the same patch levels (only for XIP 3.1).