Backup MISSED ONLY for ONE node

Hi all,

I have 4 TSM clients (OS: AIX5.1) which are "backuped" every day.
Since last friday, the status of the schedule "CLIENT.BACKUP" is "missed" for 
ONLY
ONE node (the status of the schedule is completed for the others), this node is 
the
TSM server.
In the dsmerror.log I find the messages :

ANS9455E dsmwatchd: Unable to join the local failover group with rc=3! (message
written every 6 seconds)

ANS1809E Session is lost; initializing session reopen procedure.
ANS1809E Session is lost; initializing session reopen procedure.
ANS1810E TSM session has been reestablished.
TcpFlush: Error 32 sending data on Tcp/Ip socket 8.
sessSendVerb: Error sending Verb, rc: -50
TcpFlush: Error 32 sending data on Tcp/Ip socket 8.
ANS1810E TSM session has been reestablished.
TcpFlush: Error 32 sending data on Tcp/Ip socket 6.
sessSendVerb: Error sending Verb, rc: -50
TcpFlush: Error 32 sending data on Tcp/Ip socket 6.
ANS1809E Session is lost; initializing session reopen procedure.
ANS1809E Session is lost; initializing session reopen procedure.
ANS1810E TSM session has been reestablished.

In the schedule.log , I find :

12/25/02 15:21:19 Retry # 1 Normal File--> 8,331,264
/oper/u/pnch/pnch002/oper/
aladin/2002/03/07/rAN/ICMSHALAD+0072 [Sent]
12/25/02 15:21:19 Retry # 1 Normal File--> 192,769
/oper/u/pnch/pnch002/oper/
aladin/2002/03/07/rAN/listing.ee927 [Sent]
12/25/02 15:21:19 Retry # 1 Normal File--> 390,830
/oper/u/pnch/pnch002/oper/
aladin/2002/03/07/rAN/previ72.list [Sent]
12/25/02 15:21:42 Normal File--> 8,331,264
/oper/u/pnch/pnch002/oper/aladin/2002
/03/07/rSR/ICMSHALAD+0006 ** Unsuccessful **
12/25/02 15:21:42 ANS1809E Session is lost; initializing session reopen
procedure.
12/25/02 15:21:57 ... successful
12/25/02 15:21:58 Retry # 1 Normal File--> 8,331,264
/oper/u/pnch/pnch002/oper/
aladin/2002/03/07/rSR/ICMSHALAD+0003 [ Sent]
12/25/02 15:21:58 Retry # 1 Normal File--> 8,331,264<
BR>/oper/u/pnch/pnch002/oper/
aladin/2002/03/07/rSR/ICMSHALAD+0006 [Sent]

PS : We have the 3584-LIB
The size of These two files grows every minut

Why my schedule is missed, and why for only one node?
Any help is very appreciated


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