IO Error when running script catalog.sql

dear all,
When I run the script catalog.sql, there are some error mesg showing following. on't know what cause these error. lease let me know, if you know how ot solve. hanks in advance.

JK

SVRMGRL>@ /vol2/app/oracle/product/8.1.6/rdbms/admin/catalog.sql

create or replace
*
ORA-01114: IO error writing block to file ?block # ) create or replace
*
ORA-03114: not connected to ORACLE
grant execute on STANDARD to public
*
ORA-03114: not connected to ORACLE
create or replace view v_$dlm_misc as select * from v$dlm_misc *
ORA-03114: not connected to ORACLE
drop public synonym v$dlm_misc
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