Gerald, After the 5.3 upgrade, your AS/400 started the LDAP service through the OS/400. You either need to stop the service on the AS/400 or stop the service in Domino. Do you use the LDAP service? Richard A. Frye Software Consulting Hardware, Inc. (877) 936-9829 (Office) (513) 936-0128 (Fax) Rich.Frye@xxxxxxxxx IBM Certified System Administrator - Lotus Notes and Domino 6/6.5 GKern@xxxxxxxxxxxxxxxx Sent by: domino400-bounces+rich.frye=sch-i.com@xxxxxxxxxxxx 07/29/2005 09:29 AM Please respond to Lotus Domino on the iSeries / AS400 <domino400@xxxxxxxxxxxx> To domino400@xxxxxxxxxxxx cc Subject LDAP error message after upgrade to V5R3 We upgraded to V5R3 last Saturday and since then I've been seeing the following error in the notes misc log: "LDAP Server: Listener failure, TCP/IP port number  is already in use on this system. Suspending listen task for 20 seconds due to network errors." Does anyone know why this is happening and how it can be corrected? I'm running Domino R6.5.1, and via wrkactjob I can see that the LDAP task is active. Regards, Jerry Gerald Kern IBM Certified AS/400 RPG IV Developer & RPG IV Programmer MIS Project Leader, Lotus Notes/Domino Administrator The Toledo Clinic, Inc. 4235 Secor Road Toledo, OH 43623-4299 Phone 419-479-5535 gkern@xxxxxxxxxxxxxxxx ***** This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message._______________________________________________ This is the Lotus Domino on the iSeries / AS400 (Domino400) mailing list To post a message email: Domino400@xxxxxxxxxxxx To subscribe, unsubscribe, or change list options, visit: http://lists.midrange.com/mailman/listinfo/domino400 or email: Domino400-request@xxxxxxxxxxxx Before posting, please take a moment to review the archives at http://archive.midrange.com/domino400.