java.lang.ClassNotFoundException: UserManagementException

Hi,

I am migrating code from NWDS7.0 to NWDS7.3.now i am getting below error .

java.lang.NoClassDefFoundError: com/sapportals/portal/security/usermanagement/UserManagementException

at com.unilever.KMUploadStatisticsView.onActionFindData(KMUploadStatisticsView.java:297)

at com.unilever.wdp.InternalKMUploadStatisticsView.wdInvokeEventHandler(InternalKMUploadStatisticsView.java:158)

at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.invokeEventHandler(DelegatingView.java:142)