Hello, I had an issue whereby I missed a BLANK check and the code threw an exception at which point no more messages were processed. Seems wrong for calling code to not handle the exception Code snippet here with BLANk check added final short fid = (short) fieldEntry.fieldId(); final String name = fieldEntry.name(); if (Chains.REF_COUNT_FID == fid && Data.DataCode.BLANK != fieldEntry.code()) { refCount = ((int) fieldEntry.uintValue()); Exception Exception in thread "pool-55-thread-1" Exception Type='OmmInvalidUsageException', Text='Attempt to uintValue() while entry data is blank.', Error Code='-4048' at com.thomsonreuters.ema.access.EntryImpl.ommIUExcept(EntryImpl.java:628) at com.thomsonreuters.ema.access.EntryImpl.uintValue(EntryImpl.java:347) at com.nomura.estrat.reuters.ema.chains.ChainEventHandler.processChain(ChainEventHandler.java:92) at com.nomura.estrat.reuters.ema.chains.ChainEventHandler.onRefreshMsg(ChainEventHandler.java:47) at com.thomsonreuters.ema.access.ItemCallbackClientConsumer.notifyOnRefreshMsg(ItemCallbackClient.java:2561) at com.thomsonreuters.ema.access.ItemCallbackClient.processRefreshMsg(ItemCallbackClient.java:1789) at com.thomsonreuters.ema.access.ItemCallbackClient.defaultMsgCallback(ItemCallbackClient.java:1626) at com.thomsonreuters.upa.valueadd.reactor.Reactor.sendDefaultMsgCallback(Reactor.java:1894) at com.thomsonreuters.upa.valueadd.reactor.Reactor.sendAndHandleDefaultMsgCallback(Reactor.java:1909) at com.thomsonreuters.upa.valueadd.reactor.WlItemHandler.callbackUser(WlItemHandler.java:2940) at com.thomsonreuters.upa.valueadd.reactor.WlItemHandler.readRefreshMsg(WlItemHandler.java:2191) at com.thomsonreuters.upa.valueadd.reactor.WlItemHandler.readMsg(WlItemHandler.java:1905) at com.thomsonreuters.upa.valueadd.reactor.Watchlist.readMsg(Watchlist.java:292) at com.thomsonreuters.upa.valueadd.reactor.Reactor.performChannelRead(Reactor.java:2861) at com.thomsonreuters.upa.valueadd.reactor.Reactor.dispatchChannel(Reactor.java:2481) at com.thomsonreuters.upa.valueadd.reactor.ReactorChannel.dispatch(ReactorChannel.java:574) at com.thomsonreuters.ema.access.OmmBaseImpl.rsslReactorDispatchLoop(OmmBaseImpl.java:1487) at com.thomsonreuters.ema.access.OmmBaseImpl.run(OmmBaseImpl.java:1620) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:748)