Oracle 10g

i am trying to export a schema test by using the following

C:\>expdp system/gateway@orcl schemas=test dumpfile=dir1:test%U.dmp filesize=100k logfile=dir1:mylog.log

ORA-31694: master table "SYSTEM"."SYS_EXPORT_SCHEMA_02" failed to load/unload
ORA-39095: Dump file space has been exhausted: Unable to allocate 184320 bytes
Job "SYSTEM"."SYS_EXPORT_SCHEMA_02" stopped due to fatal error at 14:16:04

Can anybody help me in this regard?