# DBMS_XMLSCHEMA.generateschema gives ORA-22303: type not found

I just had someone call about this.  
SELECT DBMS\_XMLSCHEMA.generateschema('your\_schema','your\_type') FROM DUAL;  
gives ORA-22303: type "your\_schema"."your\_type" not found  
ora-21700  
ora-06512  
  
Just upper case your\_schema and your\_type -- YOUR\_SCHEMA and YOUR\_TYPE.  
  
Hope this helps.