Into your Databases Metadata repository; is it possible that you right-click on the Item created ?
Then you use the "Retrieve schema" action to connect to the database and retrieve the Table definition that you're looking for in your tAS400Input.
Pick up all or some tables; then press next when the retrieve is done; you have access to the table definiton. You can save it via "Finish" button.
Then when you would like to add a Table in the JobDesign; just drag'n'drop from your Metadata repository the Table registered; it should works fine.
Have a good day.
It seems the problem is not Talend but the server! I've many servers and it does work on one of them! I tried the same thing in others servers and it works fine! I've Talend formation in few weeks and will ask why it doesnt work on one of my servers!