AmbiguousApplicationWindowIdException

while working in portal, internal server error occured.

This happens only with the onsite team, offshore team connects thro VPN and everything works fine. This error araises during normal clicks on the webpage.

if anyone knows solution for this, please let me know.

parts of the trace files pasted here,

#

#1.5#00145E472B7E0069000006D6000740560004184EE76F217C#1152627076178#com.sap.security.core.util##com.sap.security.core.util.[cf=com.sap.security.core.util.SecurityAudit][md=updateEffectiveSeverity()][cl=19566]######9d00be400c2011db95c200145e472b7e#Thread[Thread-14,10,SAPEngine_System_Thread[impl:5]_Group]##0#0#Info##Plain###Refreshing the logging severity#

#1.5#00145E472B7E0056000004E8000740560004184EE9AECC38#1152627113904#com.sap.tc.webdynpro.clientserver.cal.ClientManager#sap.com/tc_wddispwda#com.sap.tc.webdynpro.clientserver.cal.ClientManager.handleThrowable#AREICHER#1156##max24.us.schp.com_ED1_8065850#AREICHER#d512e77010e611db9bdb00145e472b7e#SAPEngine_Application_Thread[impl:3]_35##0#0#<b><b>Error#1#/System/UserInterface#Java###Exception(com.sap.tc.webdynpro.clientserver.session.AmbiguousApplicationWindowIdException: ApplicationWindow with Id=i9BoZ1xnvfjepsp9tWx2Mw==tU/UNHUZChyXBlljgGWw7Q== already exists within ClientWindow with Id=WID1152626875153) during processing a Web Dynpro Application.</b> [EXCEPTION]</b> #1#com.sap.tc.webdynpro.clientserver.session.AmbiguousApplicationWindowIdException: ApplicationWindow with Id=i9BoZ1xnvfjepsp9tWx2Mw==tU/UNHUZChyXBlljgGWw7Q== already exists within ClientWindow with Id=WID1152626875153 at com.sap.tc.webdynpro.clientserver.cal.ClientManager.findApplicationWindow(ClientManager.java(Compiled Code)) at com.sap.tc.webdynpro.clientserver.cal.ClientManager.findClientWindow(ClientManager.java(Compiled Code)) at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java(Compiled Code)) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doWebDynproProcessing(DispatcherServlet.java(Compiled Code)) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java(Compiled Code)) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java(Compiled Code)) at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code)) at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code)) at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java(Compiled Code)) at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java(Compiled Code)) at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java(Inlined Compiled Code)) at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java(Compiled Code)) at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java(Compiled Code)) at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java(Compiled Code)) at com.sap.engine.services.httpserver.server.Client.handle(Client.java(Compiled Code)) at com.sap.engine.services.httpserver.server.Processor.request(Processor.java(Compiled Code)) at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java(Compiled Code)) at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java(Compiled Code)) at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java(Compiled Code)) at java.security.AccessController.doPrivileged1(Native Method) at java.security.AccessController.doPrivileged(AccessController.java(Compiled Code)) at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java(Compiled Code)) at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java(Compiled Code)) -

---

# #1.5#00145E472B7E0044000000140012209E000415AF72429EA5#1149743187271#com.sap.engine.services.servlets_jsp.client.ServletResponse# sap.com/tc _wddispwda#com.sap.engine.services.servlets_jsp.client.ServletResponse#KKRISHNA#44##max24.us.schp.com_ED1_8065850#KKRISHNA#6bbac120f6ac11dacae000145e472b7e#SAPEngine_Application_Thread[impl:3]_3##0#0#Error#1#/System/Server/WebRequests#Plain###Cannot parse form based parameters from multipart request. The error is: com.sap.engine.services.httpserver.exceptions.HttpIOException: Read timeout. The client has disconnected or a synchronization error has occurred. Read [0] bytes. Expected [5558]. Exception id: [00145E472B7E0044000000120012209E000415AF72425ACF]# #1.5#00145E472B7E0044000000180012209E000415AF72432121#1149743187292#com.sap.tc.webdynpro.clientserver.cal.ClientManager# sap.com/tc _wddispwda#com.sap.tc.webdynpro.clientserver.cal.ClientManager.handleThrowable#KKRISHNA#44##max24.us.schp.com_ED1_8065850#KKRISHNA#6bbac120f6ac11dacae000145e472b7e#SAPEngine_Application_Thread[impl:3]_3##0#0#Error#1#/System/UserInterface#Java###Exception(com.sap.tc.webdynpro.clientserver.session.AmbiguousApplicationWindowIdException: ApplicationWindow with Id=yAenW0Ro28p+8XTLxEfK9Q==/n5/njLY/LAuHmHw0LEKxg== already exists within ClientWindow with Id=WID1149743131535) during processing a Web Dynpro Application. [EXCEPTION] #1#com.sap.tc.webdynpro.clientserver.session.AmbiguousApplicationWindowIdException: ApplicationWindow with Id=yAenW0Ro28p+8XTLxEfK9Q==/n5/njLY/LAuHmHw0LEKxg== already exists within ClientWindow with Id=WID1149743131535

at com.sap.tc.webdynpro.clientserver.cal.ClientManager.findApplicationWindow(ClientManager.java:896)

at com.sap.tc.webdynpro.clientserver.cal.ClientManager.findClientWindow(ClientManager.java:760)

at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:201)

at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doWebDynproProcessing(DispatcherServlet.java:154)

at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:116)

at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:55)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:390)

at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:264)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:347)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:325)

at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:887)

at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:241)

at com.sap.engine.services.httpserver.server.Client.handle(Client.java:92)

at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:148)

at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)

at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)

at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)

at java.security.AccessController.doPrivileged1(Native Method)

at java.security.AccessController.doPrivileged(AccessController.java(Compiled Code))

at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java(Compiled Code))

at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java(Compiled Code))