RMAN Error 10038

I'm trying to backup my database of about 400G. In my backup script I'm allocating 6 channels, each channel looks like this:

  allocate channel adsm1 type 'SBT_TAPE'
  parms 'ENV=
DSMO_NODE=mis_33_oracle,DSMI_CONFIG=/usr/tivoli/tsm/client/oracle/bin/dsm.opt,DSMI_LOG=/adsm/log,DSMI_ORC_DIR=/usr/tivoli/tsm/client/oracle/bin,DSMO_FS=adsmorc,DSMO_PSWDPATH=/usr/tivoli/tsm/client/oracle/bin,DSMI_DIR=/usr/tivo
li/tsm/client/api/bin,DSMO_DEBUG=49)';
  setlimit channel adsm1 kbytes 2097152 maxopenfiles 32 readrate 200;

After running for about 2-2.5 hours, I get this:

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00601: fatal error in recovery manager
RMAN-03004: fatal error during execution of command
RMAN-10038: database session for channel adsm1 terminated unexpectedly


I did an oerr on the error 10038. It states for me to look at the oracle trace file for detailed information on why the session terminated. First of all where is this so called trace file and what am I doing wrong? Oh, one more other thing, my log backups works great. Can anyone help with this problem? Thanks in advance.
rsolomonAsked:
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BajwaCommented:
Run with debug on... which will produce trace for each channel allocated and a log file.
Log will be in the path that you enter and trace in udump directory., then it will be easier to find the error.
rman target / catalog or nocatalog log=/path/filename.log
run
{allocate channel adsm1 type 'SBT_TAPE'
parms 'ENV= DSMO_NODE=mis_33_oracle,DSMI_CONFIG=/usr/tivoli/tsm/client/oracle/bin/dsm.opt,DSMI_LOG=/adsm/log,DSMI_ORC_DIR=/usr/tivoli/tsm/client/oracle/bin,DSMO_FS=adsmorc,DSMO_PSWDPATH=/usr/tivoli/tsm/client/oracle/bin,DSMI_DIR=/usr/tivo
li/tsm/client/api/bin,DSMO_DEBUG=49)';
debug on;
backup filesperset 1
format 'FULL_%d_%u'
(database include current controlfile);
debug off;
}

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