Problem executing main method with wrong connection to DB data

Hi,
I'm executing my 2 projects in the same application with wrong DB-connection data.
When i execute one of the projects, i get one only Window having this text:
+(oracle.jbo.DMLException) JBO-26061: Error al abrir la conexión JDBC.+
That's exactly what i wanted, but when i execute the other project i get this window, but also 20 windos or so having the following text:
+(oracle.jbo.JboException) JBO-29000: Se ha obtenido una excepción inesperada: java.lang.NullPointerException, mensaje=null+
In both projects the exception ocurrs in the same line: panelBinding.refreshControl(). They have exactly the same code in main class, so i don't understand why in one project i get the only window i want (the one saying JDBC conection is wrong) and in the other one i get round 20 more.
Why is this happening?
Thanks in advance. Pablo.
Edited by: user9937041 on 25-may-2011 1:34

Maybe important: in the database navigator, when a introduce a right user, but a wrong password, in project 2 the database user account gets locked. This doesn't happen in project 1.
Any idea??
Edited by: user9937041 on 25-may-2011 2:10

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