User open and grant permission as DBA

 CREATE USER SABUJ IDENTIFIED BY 123456;

GRANT UNLIMITED TABLESPACE TO SABUJ ;

GRANT CONNECT TO SABUJ;

GRANT DBA TO SABUJ;

COMMIT;

host imp user/password@tnsname fromuser=SABUJ touser=SABUJ file=FC.DMP log=FC.log

exp user/password@tnsname file=FC-%date%.dmp log=fc.log statistics=none