SAP Knowledge Base Article - Preview

3011299 - 400 Session Not Found occurs after opening and closing a UWL Worklist item then refreshing the Worklist


  • After opening and closing a UWL Worklist item, when refreshing the Worklist the UWL application times out like below: 
    400 Session Timeout (The Web Dynpro application '' has expired. Restart the application):

    400 Session Not Found (Failed to process the request: Request refers to an unknown session)
  • The issue may be observed in only certain browsers (e.g: Chrome/EDGE)

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.



  • SAP NetWeaver Application Server for Java 7.50
  • SAP Universal Worklist


SAP NetWeaver 7.5


dsm, sra, uwl, blank, 400, timeout, time, out, reload, refresh, refreshing, list 2932484 - Unexpected Session Termination for Certain Scenarios When Using Chrome Browser , KBA , EP-PIN-AI , Application Integration , EP-PIN-NAV , Navigation , BC-WD-JAV , WebDynpro Java , EP-BC-UWL , Universal Worklist , EP-PIN-PCD , Portal Content Directory , EP-PIN-PRT , Portal Runtime , Problem

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