Hi Suman,
You need to start listener of database.
check the below error
SAPUSER error or connect error 99=DBSL_ERR_DB, oerr=12541.
B ***LOG BY2=> sql error 12541 performing CON [dbsh 1246]
B ***LOG BY0=> ORA-12541: TNS:no listener [dbsh 1246]
B ***LOG BY2=> sql error 12541 performing CON [dblink 544]
B ***LOG BY0=> ORA-12541: TNS:no listener [dblink 544]
M ***LOG R19=> ThInit, db_connect ( DB-Connect 000256) [thxxhead.c 1513]
With Regards
Ashutosh Chaturvedi