2480283 - NWDS error: Another key for this value already exists

• You are using Process Integration (PI) or Process Orchestration (PO) and cannot open a mapping-object in the NeWeaver Developer Sudio (NWDS) or export the mapping to spreadsheet.
• You receive the below error:
  java.lang.IllegalArgumentException: Another key for this value already exists.
  at com.sap.ide.esr.tools.core.util.BijectiveMap.testPut(BijectiveMap.java:51)
  at com.sap.ide.esr.tools.core.util.BijectiveMap.put(BijectiveMap.java:61)
  at com.sap.ide.esr.tools.mapping.ui.model.NodeModel.createVariable(NodeModel.java:130)
  at com.sap.ide.esr.tools.mapping.ui.model.NodeModel.reloadVariables(NodeModel.java:106)
  at com.sap.ide.esr.tools.mapping.ui.editor.MappingTool.verifyMappings(MappingTool.java:363)
  at com.sap.ide.esr.tools.mapping.ui.editor.MappingTool.refreshMessages(MappingTool.java:328)
  at com.sap.ide.esr.tools.mapping.ui.editor.MessageMappingOverviewPage.reloadPage(MessageMappingOverviewPage.java:96)
  at com.sap.ide.esr.tools.mapping.ui.editor.MessageMappingOverviewPage.createFormContent(MessageMappingOverviewPage.java:43)
  ...
  at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669)
  at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)
  at org.eclipse.equinox.launcher.Main.run(Main.java:1515)
  at org.eclipse.equinox.launcher.Main.main(Main.java:1488)

• PI Release Independent
• SAP NetWeaver
• SAP Process Integration

Process Integration 7.0, PI 7.0, PI 7.01, PI 7.02, Process Integration 7.10, PI 7.10, Process Integration 7.11, PI 7.11, Process Integration 7.30, PI 7.30, Process Integration 7.31, PI 7.31, Process Orchestration 7.40, PI 7.40, PO 7.40, Process Orchestration 7.50, PI 7.50, PO 7.50, NetWeaver, XI, Eclipse Tools , KBA , BC-XI-IDE-IFL , NWDS / Eclipse IDE Tools for Integration Flow , BC-XI-IDE-MAP , Eclipse Tools for mapping tooling , Problem