Have you tried to set the RCU_JDBC_TRIM_BLOCKS environment variable to TRUE prior running RCU?
As stated on the SOA Suite Download Page under PreRequisites Step 1:
If you want to use XE you can set the RCU_JDBC_TRIM_BLOCKS environment variable to TRUE prior to running RCU. As a reminder as to support level, when running RCU against XE you will receive a warning stating that the database version is not supported by Oracle
I was able to successfully use the RCU for 220.127.116.11 on Oracle XE
I did face some issues (dont have the error messages now), but I was able to resolve them by using a user with SYSDBA and SYSOPER privileges.
Make sure that you are using a user with above privileges and that you select SYSDBA from the database user type drop down while giving the connection and user details in RCU Wizard.
In windows u need to go control panel advanced system settingsAdvanced Tab under System Properties Environment variables Under user variables New variable name =RCU_JDBC_TRIM_BLOCKS & variable value=TRUE