Oracle Database Import Error 3113/3114

Error:
IMP-00003: ORACLE error 3113 encountered
ORA-03113: end-of-file on communication channel
IMP-00003: ORACLE error 3114 encountered
ORA-03114: not connected to ORACLE
This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.

Cause:
The problem occurs because imp utiliy encounters error out when trying to execute some commands.

Solution:
1. Login as sys in the SQLPLUS and run the following sqls

@$ORACLE_HOME/rdbms/admin/dbmsread.sql
@$ORACLE_HOME/rdbms/admin/prvtread.plb

2. Redo the import.