# "ERROR(200): Unable to parse message." after Ignition's server change

**URL:** <https://forum.inductiveautomation.com/t/error-200-unable-to-parse-message-after-ignitions-server-change/106554>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [May 22, 2025, 11:55am UTC](https://forum.inductiveautomation.com/t/error-200-unable-to-parse-message-after-ignitions-server-change/106554 "2025-05-22T11:55:55Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![LSimao](https://avatars.discourse-cdn.com/v4/letter/l/d2c977/32.png) [@LSimao](https://forum.inductiveautomation.com/u/LSimao)\
**Post date:** [May 22, 2025, 11:55am UTC](https://forum.inductiveautomation.com/t/error-200-unable-to-parse-message-after-ignitions-server-change/106554/1 "2025-05-22T11:55:55Z")

</div>

Hello, everyone!

Recently, we had to change the Windows server for one of our Ignition systems and migrate from version 7.9 to 8.1. The process involved first installing 7.9 (by restoring a gateway backup from the old server) and then updating to 8.1.

Everything went well, and everything is working as intended. However, I have a lot of entries in the gateway log with this error: "ERROR(200): Unable to parse message." (Full message below.) The IP addresses of the clients are included in the error message, but those clients/workstations can still open and use the visualization apps without any issue.

```python
org.xml.sax.SAXParseException: Premature end of file.

at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)

at java.xml/com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)

at com.inductiveautomation.ignition.gateway.servlets.Gateway.doPost(Gateway.java:290)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:523)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:590)

at com.inductiveautomation.ignition.gateway.bootstrap.MapServlet.service(MapServlet.java:86)

at org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1410)

at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764)

at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1665)

at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:527)

at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:131)

at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:598)

at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)

at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:223)

at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1580)

at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)

at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1384)

at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176)

at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484)

at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1553)

at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174)

at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1306)

at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129)

at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)

at com.inductiveautomation.catapult.handlers.RemoteHostNameLookupHandler.handle(RemoteHostNameLookupHandler.java:121)

at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)

at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:301)

at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:51)

at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:141)

at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)

at org.eclipse.jetty.server.Server.handle(Server.java:563)

at org.eclipse.jetty.server.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1598)

at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:753)

at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:501)

at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:287)

at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314)

at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)

at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)

at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:421)

at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:390)

at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:277)

at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:199)

at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:411)

at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:969)

at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1194)

at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1149)

at java.base/java.lang.Thread.run(Unknown Source)

```

Has anyone had this problem before and could give me some advice? Unfortunately, there isn't much information about it here in the forum.

Thanks in advance!