I don't know what support has asked you for, if you have already collected these, please ignore this
On the cell managere, stop DP
cd /opt/omni/sbin
./omnisv stop
Empty these files on the cell manager
/var/opt/omni/log/debug.log
/var/opt/omni/log/hpdp-idb-cp.log
/var/opt/omni/server/db80/pg/pg_log/*
/var/opt/omni/log/AppServer/*
Please feel free to make copies
Start DP in debug mode
./omnisv start -debug 1-500 IDB.txt
./omnisv status
If teh MMD status still shows 'Down', stop DP. IN the /tmp directory, look for long filenames that start OB2DBG and end IDB.txt, put them, and these logs
/var/opt/omni/log/debug.log
/var/opt/omni/log/hpdp-idb-cp.log
/var/opt/omni/server/db80/pg/pg_log/*
/var/opt/omni/log/AppServer/*
into a 'tar', 'rar' or 'zip' file. Notify DP support that you have these files, and want to elevate the case