ANS1029E Communications have been dropped

Can anyone help me with next problem ?

I did upgrade client to 4.130 on last Friday and since then  the daily 
scheduled backup fails
with ANS1029E after having inspected about 512.000 objects (has still some 
thousands of objects to go)

Thanks for any help,

Paul Van de Vijver
Honda Europe NV
Belgium

TSM Server 4.2.1.0 running on OS390
TSM Client  4.2.1.30 running on WinNT

DSMERROR.LOG

22.03.2002 18:05:33 ConsoleEventHandler(): Caught Ctrl-C console event .
22.03.2002 18:05:33 ConsoleEventHandler(): Cleaning up and terminating Process 
...
23.03.2002 00:30:10 ANS1029E Communications have been dropped.

23.03.2002 00:30:10 ANS1512E Scheduled event '@35564' failed.  Return code = 4.
23.03.2002 23:42:39 ANS1029E Communications have been dropped.

23.03.2002 23:42:39 ANS1512E Scheduled event '@35623' failed.  Return code = 4.
25.03.2002 00:50:28 ANS1029E Communications have been dropped.

25.03.2002 00:50:28 ANS1512E Scheduled event '@35684' failed.  Return code = 4.
25.03.2002 08:59:35 Error opening input file ????????t
25.03.2002 09:32:36 ConsoleEventHandler(): Caught Ctrl-C console event .
25.03.2002 09:32:36 ConsoleEventHandler(): Cleaning up and terminating Process 
...

DSMSCHED.LOG from last days :

25.03.2002 00:50:28 Total number of objects inspected:  512,218
25.03.2002 00:50:28 Total number of objects backed up:      119
25.03.2002 00:50:28 Total number of objects updated:          0
25.03.2002 00:50:28 Total number of objects rebound:          0
25.03.2002 00:50:28 Total number of objects deleted:          0
25.03.2002 00:50:28 Total number of objects expired:        251
25.03.2002 00:50:28 Total number of objects failed:           0
25.03.2002 00:50:28 Total number of bytes transferred:   675.31 MB
25.03.2002 00:50:28 Data transfer time:                1,784.51 sec
25.03.2002 00:50:28 Network data transfer rate:          387.51 KB/sec
25.03.2002 00:50:28 Aggregate data transfer rate:        111.61 KB/sec
25.03.2002 00:50:28 Objects compressed by:                    5%
25.03.2002 00:50:28 Elapsed processing time:           01:43:15
25.03.2002 00:50:28 --- SCHEDULEREC STATUS END
25.03.2002 00:50:28 ANS1029E Communications have been dropped.
25.03.2002 00:50:28 --- SCHEDULEREC OBJECT END @35684 24.03.2002 23:02:38
25.03.2002 00:50:28 ANS1512E Scheduled event '@35684' failed.  Return code = 4.
25.03.2002 00:50:28 Sending results for scheduled event '@35684'.

-------------------------------------------------------------------------------------------------------------------------
23.03.2002 23:42:39 Total number of objects inspected:  512,122
23.03.2002 23:42:39 Total number of objects inspected:  512,122
23.03.2002 23:42:39 Total number of objects backed up:       41
23.03.2002 23:42:39 Total number of objects updated:          0
23.03.2002 23:42:39 Total number of objects rebound:          0
23.03.2002 23:42:39 Total number of objects deleted:          0
23.03.2002 23:42:39 Total number of objects expired:        235
23.03.2002 23:42:39 Total number of objects failed:           0
23.03.2002 23:42:39 Total number of bytes transferred:   432.08 MB
23.03.2002 23:42:39 Data transfer time:                1,278.21 sec
23.03.2002 23:42:39 Network data transfer rate:          346.15 KB/sec
23.03.2002 23:42:39 Aggregate data transfer rate:         84.48 KB/sec
23.03.2002 23:42:39 Objects compressed by:                    2%
23.03.2002 23:42:39 Elapsed processing time:           01:27:16
23.03.2002 23:42:39 --- SCHEDULEREC STATUS END
23.03.2002 23:42:39 ANS1029E Communications have been dropped.
23.03.2002 23:42:39 --- SCHEDULEREC OBJECT END @35623 23.03.2002 22:13:10
23.03.2002 23:42:39 ANS1512E Scheduled event '@35623' failed.  Return code = 4.
23.03.2002 23:42:39 Sending results for scheduled event '@35623'.

----------------------------------------------------------------------------------------------------------------------------
23.03.2002 00:30:09 Total number of objects inspected:  512,635
23.03.2002 00:30:09 Total number of objects inspected:  512,635
23.03.2002 00:30:09 Total number of objects backed up:    2,009
23.03.2002 00:30:09 Total number of objects updated:          0
23.03.2002 00:30:09 Total number of objects rebound:          0
23.03.2002 00:30:09 Total number of objects deleted:          0
23.03.2002 00:30:09 Total number of objects expired:      1,678
23.03.2002 00:30:09 Total number of objects failed:           0
23.03.2002 00:30:09 Total number of bytes transferred:     1.58 GB
23.03.2002 00:30:09 Data transfer time:                4,224.16 sec
23.03.2002 00:30:09 Network data transfer rate:          393.27 KB/sec
23.03.2002 00:30:09 Aggregate data transfer rate:        201.34 KB/sec
23.03.2002 00:30:09 Objects compressed by:                   52%
23.03.2002 00:30:09 Elapsed processing time:           02:17:30
23.03.2002 00:30:09 --- SCHEDULEREC STATUS END
23.03.2002 00:30:10 ANS1029E Communications have been dropped.
23.03.2002 00:30:10 --- SCHEDULEREC OBJECT END @35564 22.03.2002 22:07:54
23.03.2002 00:30:10 ANS1512E Scheduled event '@35564' failed.  Return code = 4.
23.03.2002 00:30:10 Sending results for scheduled event '@35564'.