Export: Release 10.2.0.1.0 - Production on Thursday, 31 May, 2007 10:14:20It means that you forgot to grant a quota on the default tablespace of the user, in this case named YOCOYA.
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Connected to: Oracle Database 10g Express Edition Release 10.2.0.1.0 - Production
ORA-31626: job does not exist
ORA-31633: unable to create master table "YOCOYA.SYS_EXPORT_TABLE_05"
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 95
ORA-06512: at "SYS.KUPV$FT", line 863
ORA-01950: no privileges on tablespace 'USERS'
alter user YOCOYA quota n M on USERS
will fix the problem unless the total allowance of n megabytes is insufficient to carry out the export, in which case you will get:ORA-31626: job does not exist
ORA-31633: unable to create master table "YOCOYA.SYS_EXPORT_TABLE_05"
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 95
ORA-06512: at "SYS.KUPV$FT", line 863
ORA-01536: space quota exceeded for tablespace 'USERS'
See message translations for ORA-31626, ORA-31633, ORA-01950, ORA-01536 and search additional resources.