null pointer exception during ovs implementation

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hi,

am trying to implement ovs, I've done the necesssary configuration from this wiki link.

http://wiki.sdn.sap.com/wiki/display/WDJava/ValueHelp-ObjectValue+Selector

but when run my application and click on the input help icon.. am geting an nullpointer exception

java.lang.NullPointerException: while trying to invoke the method com.sap.tc.webdynpro.progmodel.api.IWDNodeInfo.getAttributes() of an object loaded from local variable 'dataNode'

at com.sap.tc.webdynpro.corecomp.valuehelp.ovshandler.OVSHandlerView.createMappedNode(OVSHandlerView.java:395)

at com.sap.tc.webdynpro.corecomp.valuehelp.ovshandler.OVSHandlerView.wdDoInit(OVSHandlerView.java:136)

at com.sap.tc.webdynpro.corecomp.valuehelp.ovshandler.wdp.InternalOVSHandlerView.wdDoInit(InternalOVSHandlerView.java:166)

at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.doInit(DelegatingView.java:59)

at com.sap.tc.webdynpro.progmodel.controller.Controller.initController(Controller.java:227)

... 66 more

Edited by: mcsekar_21 on Jan 18, 2011 8:52 AM