hi matt thanks to reply I'm using those versions : JasperETL Version: V2.0.2 Build id: r3513-20070521-1149 oracle Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production 1. i try to change between "service name" and "SID" but the URL connection always use "thin" driver. i try with both method and get same error (can connect but can't get back the schema) 2. i know exactly what i should get back because i'm using a postgresql connection and this one works fine. when click on "select all", i have check with the DBA and see the sql is sent to the database and the database reply, but jasper ETL stay in pending mode. another information, i have no problem to execute a request from a "built-in" connection.