Hello Prem,
Which OS user are you logged in as ?
The problem could be that the OS user you logged in do not have permissions to create the shared memory file in the directory H:\sapdb\wrk\
Login as <sid>adm user and try to start the liveCache.
If you are logged in as <sid>adm user and still getting the same issue, run the program "sdbverify"
from command line and post the results. Program is located under /sapdb/programs/bin directory.
Regards, Yashwanth