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

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java.lang.NullPointerException:
at com.thortech.xl.dataobj.util.tcAttributeSource.getAttrColumnName(Unknown Source)
at com.thortech.xl.dataobj.tcRCE.createUserRecord(Unknown Source)
at com.thortech.xl.dataobj.tcRCE.applyActionRules(Unknown Source)
at com.thortech.xl.dataobj.tcRCE.checkDataSorted(Unknown Source)
at com.thortech.xl.dataobj.tcRCE.eventPostUpdate(Unknown Source)
at com.thortech.xl.dataobj.tcDataObj.update(Unknown Source)
at com.thortech.xl.dataobj.tcDataObj.save(Unknown Source)
at com.thortech.xl.dataobj.tcTableDataObj.save(Unknown Source)
at com.thortech.xl.dataobj.tcRCE.reapplyRules(Unknown Source)
at com.thortech.xl.ejb.databeansimpl.tcRCEBean.reapplyRules(Unknown Source)
at com.thortech.xl.ejb.beans.tcRCE_4tknfu_EOImpl.reapplyRules(tcRCE_4tknfu_EOImpl.java:130)
at com.thortech.xl.ejb.beans.tcRCE_4tknfu_EOImpl_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.activation.ActivatableServerRef.invoke(ActivatableServerRef.java:85)
at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:477)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:147)
at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:473)
at weblogic.rmi.internal.wls.WLSExecuteRequest.run(WLSExecuteRequest.java:118)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)

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