1689109 - BI4 : "The report cannot be generated. Please contact your administrator" error opening a migrated WebIntelligence report in Rich Client

Opening a migrated webi report on WRC gives error "The report cannot be generated. Please contact your administrator"

with details:

java.util.concurrent.ExecutionException: com.businessobjects.sdk.core.server.CommunicationException$UnexpectedServerException: repeng_error_en_71
 at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
 at java.util.concurrent.FutureTask.get(FutureTask.java:83)
 at javax.swing.SwingWorker.get(SwingWorker.java:583)
 at com.sap.webi.toolkit.ui.tasks.WebITask.getResult(WebITask.java:85)
 at com.sap.webi.ui.tasks.NavigOnDocumentTask.doneProcess(NavigOnDocumentTask.java:82)
 at com.sap.webi.toolkit.ui.tasks.WebITask.done(WebITask.java:123)
 at javax.swing.SwingWorker$5.run(SwingWorker.java:718)
 at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.run(SwingWorker.java:864)
 at sun.swing.AccumulativeRunnable.run(AccumulativeRunnable.java:95)
 at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.actionPerformed(SwingWorker.java:874)
 at javax.swing.Timer.fireActionPerformed(Timer.java:271)
 at javax.swing.Timer$DoPostEvent.run(Timer.java:201)
 at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
 at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
 at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
 at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
 at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
 at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

• BI4.0 SP2 patch 10
• BW
• Windows 7

Feat Pack 3 , KBA , BI-RA-WBI , Web Intelligence , Problem