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java.lang.NullPointerException: 	at com.ibm.tivoli.maximo.rest.MboJSONStructure.setJSONObjectAttribute(MboJSONStructure.java:601)	at com.ibm.tivoli.maximo.rest.MboJSONStructure.mbo2JSONObject(MboJSONStructure.java:491)	at com.ibm.tivoli.maximo.rest.MboJSONStructure.serializeMboSetAsJSONObject(MboJSONStructure.java:294)	at com.ibm.tivoli.maximo.rest.MboJSONStructure.serializeMboSetAsJSONObject(MboJSONStructure.java:126)	at com.ibm.tivoli.maximo.rest.MboJSONSerializer.serializeResource(MboJSONSerializer.java:76)	at com.ibm.tivoli.maximo.rest.MboSerializer.serialize(MboSerializer.java:274)	at com.ibm.tivoli.maximo.rest.BaseResourceRequestHandler.generateResponse(BaseResourceRequestHandler.java:456)	at com.ibm.tivoli.maximo.rest.BaseResourceRequestHandler.handleRequest(BaseResourceRequestHandler.java:343)	at com.ibm.tivoli.maximo.rest.MaximoRestServlet.invokeRequestHandler(MaximoRestServlet.java:783)	at com.ibm.tivoli.maximo.rest.MaximoRestServlet.doGet(MaximoRestServlet.java:336)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:575)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1232)	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:781)	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:480)	at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178)	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1114)	at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:87)	at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:940)	at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1817)	at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:200)	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:463)	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:530)	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:316)	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:287)	at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.determineNextChannel(SSLConnectionLink.java:1049)	at com.ibm.ws.ssl.channel.impl.SSLConnectionLink$MyReadCompletedCallback.complete(SSLConnectionLink.java:643)	at com.ibm.ws.ssl.channel.impl.SSLReadServiceContext$SSLReadCompletedCallback.complete(SSLReadServiceContext.java:1818)	at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:175)	at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)	at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)	at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)	at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)	at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)	at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)	at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1881)