00C900BF

Explanation
  Db2 is
unable to obtain a lock because IRLM detected an 'out of record list'
storage condition. The record list is that part of the coupling facility
lock structure that contains the 'modify locks' (those locks that
would be retained in case of a failure).

System action
  SQLCODE -904 is returned to the user with this
reason code. This reason code and the resource name are returned in
the cursor table (CT) and made available to the user in the SQLCA.
If it is active, an IFCID 0021 trace record is written and might contain
additional diagnostic information. 

System programmer response
  If this becomes
a prevalent problem, you will need to redistribute the coupling facility
lock structure storage resource to make more room for the record list.
You can do this in one of two ways: 
Issue a rebuild.

Dynamically change the lock structure size.