# Browse OPC Server

**URL:** <https://forum.inductiveautomation.com/t/browse-opc-server/837>\
**Category:** Archived Topics\
**Created:** [October 7, 2008, 3:31pm UTC](https://forum.inductiveautomation.com/t/browse-opc-server/837 "2008-10-07T15:31:22Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![matth](https://avatars.discourse-cdn.com/v4/letter/m/f475e1/32.png) [@matth](https://forum.inductiveautomation.com/u/matth)\
**Post date:** [October 7, 2008, 3:31pm UTC](https://forum.inductiveautomation.com/t/browse-opc-server/837/1 "2008-10-07T15:31:22Z")

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I want to add another OPC tag. I tried to browse from my development machine, from the server running FPMI and from the server running FSQL/Kepware. All returned the error. I wonder if this is a DCOM problem, but everything else has been working just fine…

com.inductiveautomation.factorypmi.common.gateway\_interface.GatewayException: Gateway Error 500: IO Exception during browse request:Connection refused: connect  
at com.inductiveautomation.factorypmi.common.gateway\_interface.GatewayInterface.runSQLTagsFSQLBrowse(GatewayInterface.java:538)  
at com.inductiveautomation.factorypmi.designer.sqltags.opcbrowser.FSQLNode.loadChildren(FSQLNode.java:40)  
at com.inductiveautomation.factorypmi.designer.sqltags.opcbrowser.AbstractOPCTreeNode$Loader.run(AbstractOPCTreeNode.java:65)  
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)  
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)  
at java.util.concurrent.FutureTask.run(Unknown Source)  
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)  
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)  
at java.lang.Thread.run(Unknown Source)  
Caused by: com.inductiveautomation.factorypmi.common.gateway\_interface.GatewayResponse$GatewayThrowable: Connection refused: connect  
at com.inductiveautomation.factorypmi.common.gateway\_interface.GatewayInterface$ResponseParser.startElement(GatewayInterface.java:1408)  
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown Source)  
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)  
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)  
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)  
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)  
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)  
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)  
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)  
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)  
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)  
at com.inductiveautomation.factorypmi.common.gateway\_interface.GatewayInterface.getResponse(GatewayInterface.java:201)  
at com.inductiveautomation.factorypmi.common.gateway\_interface.GatewayInterface.getResponse(GatewayInterface.java:146)  
at com.inductiveautomation.factorypmi.common.gateway\_interface.GatewayInterface.getResponse(GatewayInterface.java:138)  
at com.inductiveautomation.factorypmi.common.gateway\_interface.GatewayInterface.runSQLTagsFSQLBrowse(GatewayInterface.java:535)  
… 8 more

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<div class="post-metadata">

**Author:** ![Carl.Gould](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/carl.gould/32/7262_2.png) [@Carl.Gould](https://forum.inductiveautomation.com/u/Carl.Gould)\
**Post date:** [October 7, 2008, 3:35pm UTC](https://forum.inductiveautomation.com/t/browse-opc-server/837/2 "2008-10-07T15:35:29Z")

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In FactorySQL, under Settings \> SQLTags Settings and then under the “OPC Browsing” heading, what does it say for “Published Address”?

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**Author:** ![matth](https://avatars.discourse-cdn.com/v4/letter/m/f475e1/32.png) [@matth](https://forum.inductiveautomation.com/u/matth)\
**Post date:** [October 7, 2008, 4:14pm UTC](https://forum.inductiveautomation.com/t/browse-opc-server/837/3 "2008-10-07T16:14:11Z")

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It was set to ‘localhost.’ I changed it to the IP of the machine and it is working now. Thanks for the help.

-Matt

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<div class="post-metadata">

**Author:** ![Carl.Gould](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/carl.gould/32/7262_2.png) [@Carl.Gould](https://forum.inductiveautomation.com/u/Carl.Gould)\
**Post date:** [October 7, 2008, 4:15pm UTC](https://forum.inductiveautomation.com/t/browse-opc-server/837/4 "2008-10-07T16:15:46Z")

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Great, that was my suspicion.