ANS1030E System ran out of memory

Hi !!! !!~~

I have got error message when run dsmc selective backup.
before, This system have been installed HSM module, but uninstall it.
TSM Server and Client installed on the same machine.

  # dsmc  selective  /handy5/sancbox/2002/1/   -subdir=yes
   . . .
   /handy5/sancbox/2002/1/9/433/bi1200943336.1 [Sent]
   Normal File-->           380,325
   /handy5/sancbox/2002/1/9/433/w1200943338.1  ** Unsuccessful **

   Total number of objects inspected:  357,412
   Total number of objects backed up:  356,096
   Total number of objects updated:          0
   Total number of objects rebound:          0
   Total number of objects deleted:          0
   Total number of objects expired:          0
   Total number of objects failed:           0
   Total number of bytes transferred:    12.77 GB
   Data transfer time:                  339.81 sec
   Network data transfer rate:        39,427.33 KB/sec
   Aggregate data transfer rate:      1,377.43 KB/sec
   Objects compressed by:                    0%
   Elapsed processing time:           02:42:06
   ANS1030E System ran out of memory. Process ended.  <==============

  # cp   /handy5/sancbox/2002/1/9/433/w1200943338.1    /tmp
     There is not enough memory available now   <--- not copied because cp
command Error message

  but,
  #  umount /handy5
  and then
  #  mount   /handy5
  #  cp   /handy5/sancbox/2002/1/9/433/w1200943338.1    /tmp
     <--- cp command sucessful ...this file is small size.

System Resource
-------------------------
RS/6000 H80 450MHz 4-way, 6GB memory System
RS/6000 H80 450MHz 4-way, 6GB memory System

/handy5 : 300,000 number of inodes

and /handy5 used space : 10GB

[root:/]ulimit -a
time(seconds)         unlimited
file(blocks)              unlimited
data(kbytes)           unlimited
stack(kbytes)         unlimited
memory(kbytes)     unlimited
coredump(blocks)   2097151
nofiles(descriptors)  unlimited

Software Version List
  - AIX 4.3.3.6
  - Handy Groupware Version : 5.1
  - Oracle Ent. 8i
  - Apache
  - JDK 1.3.0
  - TSM v4.1.4.0

TSM config Infor
------------------------
dsmserv.opt
dsmserv.opt
    - TCPWINDOWSSIZE : 65536
    - Bufpoolsize : 65536, Logpoolsize : 2048
    - TXNGroupmax 256

dsm.opt
    - TXNByte : 2097152

Help me!!~~

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