onmode
usage:  onmode -abCcDdFklMmnOpQRrSsuyZz
      -a <kbytes>    Increase shared memory segment size.
      -b <version>   Revert Dynamic Server disk structures.
      -BC [ 1 | 2 ]  Change server large chunk mode
      -c [block | unblock]   Do Checkpoint. Block or unblock server. 
      -C {start #|stop #|high|low|threshold} Tune Btree scanner resources.
      -D   <max PDQ priority allowed>
      -d   {standard|{primary|secondary <servername>}} set DR server type
      -F   Free unused memory segments
      -k   Shutdown completely
      -e {on|off|enable|flush} configure or flush shared statement cache.
      -l   Force to next logical log
      -M   <decision support memory in kbytes>
      -m   Go to multi-user on-line
      -n   Set shared memory buffer cache to non-resident
      -O   Override space down blocking a checkpoint
      -p <+-#> <class>   Start up or remove virtual processors of
           a specific class
      -Q   <max # decision support queries>
      -R   Rebuild the /INFORMIXDIR/etc/.infos.DBSERVERNAME file
      -r   Set shared memory buffer cache to resident
      -S   <max # decision support scans>
      -s   Shutdown to single user
      -u   Shutdown and kill all attached sessions
      -W   {STMT_CACHE_NOLIMIT { 0 | 1 } | STMT_CACHE_HITS <#>}   Sets ssc
           parameters.
      -y   Do not require confirmation
      -Y <sid> [ 0 | 1 ] Set or unset dynamic explain
      -Z <address> heuristically complete specified transaction
      -z <sid>   Kill specified session id

onmode -H

Transaction ID not found in transaction list.