How to resolve IMP-00003: ORACLE error 30510 encountered while importing portal or any other oracle application schema:

How to resolve IMP-00003: ORACLE error 30510 encountered while importing portal or any other oracle application schema:

As the PORTAL or application user, manually re-create the logoff trigger:
SQL> CREATE TRIGGER logoff_trigger
before logoff on schema
begin    -- Call wwsec_oid.unbind to close open OID connections if any.
wwsec_oid.unbind;
exception
when others then
-- Ignore all the errors encountered while unbinding.
null;
end logoff_trigger;
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