Description:
This hotfix doesn't need any TRA hotfix. The patch can be downloaded from the TIBCO Support ftp server, support-ftp.tibco.com. Please use your eSupport username and password to access the server. After connecting, go to available_downloads/ActiveEnterprise/BusinessWorks/BW/5.1.3/hotfix-18/  to download the appropriate hotfix for your OS/platform.

The defects fixed in BW 5.1.3 HF 18 are:

Defect Id: 1-6OEU8W
  Service Request Id: 1-6NMIED
    When using JMS client ack mode, the engine sometime stops processing
    messages from the queue.

  Defect Id: 1-6NPP5W, 1-6NPP9Q, 1-6NPPAP
  Service Request Id:  1-6NBP65
    Wait/notify and checkpoint activities do not reinitialize stale DB
    connections in the connection pool.