2640375 - An error has occurred when activating this view: NWDS issue

Symptom

The SAP Netweaver Developer Studio (SAP NWDS) Deployment perspective files to load (or deployment/undeployment does not commence) and the below error is reported:

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An error has occurred when activating this view
org.eclipse.ui.internal.ErrorViewPart cannot be cast to com.sap.deployment.ui.view.ExplorerView
java.lang.NullPointerException
at com.sap.deployment.ui.nodes.SystemRootNode.addSystem(SystemRootNode.java:67)
at com.sap.deployment.ui.nodes.SystemRootNode.refresh(SystemRootNode.java:53)
at com.sap.deployment.ui.nodes.SystemRootNode.<init>(SystemRootNode.java:24)
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Environment

SAP NetWeaver Developer Studio (NWDS)
Java Development Infrastructure (JDI)

Product

SAP Composition Environment all versions ; SAP Enterprise Portal all versions ; SAP NetWeaver Application Server all versions ; SAP NetWeaver Application Server for Java all versions ; SAP NetWeaver all versions ; SAP Process Integration all versions ; SAP Solution Manager all versions

Keywords

issue, popup, pop up, 1321831, .metadata, .log, 751640, sap note, sapnote Preferences -clean SapNetweaverDeveloperStudio.ini , KBA , BC-CTS-DI , Development Infrastructure (NetWeaver Java) , BC-DWB-JAV-DII , Development Infrastructure Integration , Problem

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