Resource busy

Question

Can someone plz tell me what could be the problem here??
noone is accessing this table now and the DBA had killed all my sessions, but still i am getting this error.
FAS: FASBD001> create index indx_optionexpense on optionexpense(grn_n);
create index indx_optionexpense on optionexpense(grn_n)
ERROR at line 1:
ORA-00054: resource busy and acquire with NOWAIT specified

Answer 1

other sessions might have trying access or locked the table.
select object_id
   from dba_objects
  where object_name = '<tablename>';
select sid
   from v$access
  where owner  = '<table owner>'
    and object = '<table name>';
select sid, serial#, command, taddr
   from v$session
  where sid = <session id number>;
-- once you identified and inverstigate the session that access the table
-- you can have the session terminated.
alter system kill session '<sid, serial#>';note: this must be run with dba account privileges.