java.lang.NullPointerException: This exception has no message.

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This exception has no message.
at org.netbeans.modules.j2ee.deployment.config.ConfigSupportImpl.setCMPMappingInfo(
at org.netbeans.modules.j2ee.ejbjarproject.ejb.wizard.cmp.RelatedCMPWizard.createBeans(
at org.netbeans.modules.j2ee.ejbjarproject.ejb.wizard.cmp.RelatedCMPWizard.access$000(
at org.netbeans.modules.j2ee.ejbjarproject.ejb.wizard.cmp.RelatedCMPWizard$
at org.openide.util.RequestProcessor$
at org.openide.util.RequestProcessor$

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