Help required with deadlock issue

I am in need of some pointers with a deadlock issue.

The deadlock is occurring within a stored procedure provided by a third party software supplier, (they are investigating, but very slowly!)

The procedure doesn't do any work itself, it just submits job to be run by the background processes. We have 6 of these background processes running.

Each of the submitted jobs process records within the same base table, but never the same record within that table.

Every now and again a deadlock occurs. The following snip-it comes from the trace file. The trace suggests that the sessions were not waiting for locks to be release on rows.

So that question is, how do I find out what was causing the deadlock.

Any pointers would be appreciated.

Kevin

Oracle7 Server Release 7.3.2.3.0
on
Digital UNIX V3.2C (Rev. 148)

• SESSION ID:(7.1059) 1998.10.16.17.53.37.596 DEADLOCK DETECTED Current SQL statement for this session: UPDATE PRD_MVTS SET INCLD_IN_MSH='1' WHERE ROWID = :b1
  ----- PL/SQL Call Stack -----
  object line object handle number name 10fa0d8 349 procedure MERLIVE.MSP_MSTK0360 1c15300 1 anonymous block 1c15300 1 anonymous block The following deadlock is not an ORACLE error. It is a deadlock due to user error in the design of an application or from issuing incorrect ad-hoc SQL. The following information may aid in determining the deadlock: Deadlock graph: ---------Blocker(s)-------- ---------Waiter(s)------
  ---
  Resource Name process session holds waits process session holds waits TX-00030031-0000324b 8 7 X 13 31 S TX-00030021-00003154 13 31 X 8 7 S Rows waited on: Session 31: no row Session 7: no row