The following error occur in the server.log when trying to archive any schema object:
2012-03-13 13:04:25,281 INFO [STDOUT] (QuartzWorkerThread-5) ERROR [QuartzWorkerThread-5] (SchemaObjectFactory.java:64) - java.lang.Exception: One or more properties are not defined for dbcode: CIFADA [DB_NAME] Please use the suitable connect window to set the correct value(s)
2012-03-13 13:04:25,297 INFO [STDOUT] (QuartzWorkerThread-5) ERROR [QuartzWorkerThread-5] (ProcessObjectLockBean.java:168) - Error in ProcessObjectLock
It's turned out that DBMS column is set to 084 instead of 090
Go to Maintenance | General | Oracle Applications Connect | locate the DBMS column and click on the drop down. Change it to Oracle.