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I would like to do CLient server Java with JDBC App with cool plex but

I would like to do CLient server Java with JDBC App with cool plex but

I would like to do CLient server Java with JDBC App with cool plex but

(OP)
We would like to do an application Client-Server in Java with Cool:plex
But I think (I sure) that we have a problem somewhere but i don't know where?
When I open my applications I can see my first panel but after ...
If I would like to start my application ,my Java consol said :
Exception occurred during event dispatching:

java.lang.NullPointerException

    at ObRun.ObFunction.ObMessageLog.<init>(ObMessageLog.java:74)

    at ObRun.ObFunction.ObClientApp.processMessage(ObClientApp.java:329)

    at ObRun.ObFunction.ObClientApp.logError(ObClientApp.java:203)

    at ObRun.ObFunction.ObApplication.log(ObApplication.java:414)

    at ObRun.ObDatabase.ObDatabaseMgr.connect(ObDatabaseMgr.java:136)

    at server.SRcF_ObFnc.ObRun(SRcF_ObFnc.java:119)

    at ObRun.ObFunction.ObLocalJavaCall.call(ObCall.java:185)

    at ObRun.ObFunction.ObCallMgr.obCallFunction(ObCallMgr.java:133)

    at ObRun.ObFunction.ObCallMgr.obCallFunction(ObCallMgr.java:111)

    at ObRun.ObFunction.ObApplication.obCallFunction(ObApplication.java:369)

    at panels.Menu3_ObFnc$Menu3_ObPnl.eventsHandler(Menu3_ObFnc.java:465)

    at ObRun.ObPanel.ObCtrlData.ObCtrlData.testEvent(ObCtrlData.java:832)

    at ObRun.ObPanel.ObCtrlGui.ObPushbuttonGui.actionPerformed(ObPushbuttonGui.java:366)

    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)

    at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(Unknown Source)

    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)

    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)

    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)

    at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)

    at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)

    at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)

    at java.awt.Component.processMouseEvent(Unknown Source)

    at java.awt.Component.processEvent(Unknown Source)

    at java.awt.Container.processEvent(Unknown Source)

    at java.awt.Component.dispatchEventImpl(Unknown Source)

    at java.awt.Container.dispatchEventImpl(Unknown Source)

    at java.awt.Component.dispatchEvent(Unknown Source)

    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)

    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)

    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)

    at java.awt.Container.dispatchEventImpl(Unknown Source)

    at java.awt.Component.dispatchEvent(Unknown Source)

    at java.awt.EventQueue.dispatchEvent(Unknown Source)

    at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)

    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

    at java.awt.EventDispatchThread.run(Unknown Source)

Can you help me?


Jerome
(Excuse if my english is bad,I'm french)

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