# Connection error when trying to browse OPC tags from OPC UA server

**URL:** <https://forum.inductiveautomation.com/t/connection-error-when-trying-to-browse-opc-tags-from-opc-ua-server/85422>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [February 8, 2024, 7:34am UTC](https://forum.inductiveautomation.com/t/connection-error-when-trying-to-browse-opc-tags-from-opc-ua-server/85422 "2024-02-08T07:34:23Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Om33](https://avatars.discourse-cdn.com/v4/letter/o/7ba0ec/32.png) [@Om33](https://forum.inductiveautomation.com/u/Om33)\
**Post date:** [February 8, 2024, 7:34am UTC](https://forum.inductiveautomation.com/t/connection-error-when-trying-to-browse-opc-tags-from-opc-ua-server/85422/1 "2024-02-08T07:34:23Z")

</div>

Hello,

I get the error below when trying to browse opc tags from opc ua server:

```auto
Java Traceback:
Traceback (most recent call last):
  File "<input>", line 6, in <module>
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.newGatewayException(GatewayInterface.java:351)

	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.getResponse(GatewayInterface.java:543)

	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:283)

	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.invokeWithTimeout(GatewayInterface.java:966)

	at com.inductiveautomation.factorypmi.application.script.builtin.ialabs.IALabsOPCFunctions.doBrowse(IALabsOPCFunctions.java:15)

	at com.inductiveautomation.ignition.common.script.builtin.ialabs.AbstractIALabsOPCFunctions.browse(AbstractIALabsOPCFunctions.java:25)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

	at java.base/java.lang.reflect.Method.invoke(Unknown Source)

com.inductiveautomation.ignition.client.gateway_interface.GatewayException: com.inductiveautomation.ignition.client.gateway_interface.GatewayException: Read timed out

	at org.python.core.Py.JavaError(Py.java:547)

	at org.python.core.Py.JavaError(Py.java:538)

	at org.python.core.PyReflectedFunction. __call__ (PyReflectedFunction.java:192)

	at com.inductiveautomation.ignition.common.script.ScriptManager$ReflectedInstanceFunction. __call__ (ScriptManager.java:552)

	at org.python.core.PyObject. __call__ (PyObject.java:400)

	at org.python.pycode._pyx1241.f$0(<input>:6)

	at org.python.pycode._pyx1241.call_function(<input>)

	at org.python.core.PyTableCode.call(PyTableCode.java:173)

	at org.python.core.PyCode.call(PyCode.java:18)

	at org.python.core.Py.runCode(Py.java:1687)

	at org.python.core.Py.exec(Py.java:1731)

	at org.python.util.PythonInterpreter.exec(PythonInterpreter.java:277)

	at org.python.util.InteractiveInterpreter.runcode(InteractiveInterpreter.java:130)

	at com.inductiveautomation.ignition.designer.gui.tools.jythonconsole.JythonConsole$ConsoleWorker.doInBackground(JythonConsole.java:626)

	at com.inductiveautomation.ignition.designer.gui.tools.jythonconsole.JythonConsole$ConsoleWorker.doInBackground(JythonConsole.java:614)

	at java.desktop/javax.swing.SwingWorker$1.call(Unknown Source)

	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)

	at java.desktop/javax.swing.SwingWorker.run(Unknown Source)

	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

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

Caused by: com.inductiveautomation.ignition.client.gateway_interface.GatewayException: Read timed out

	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.newGatewayException(GatewayInterface.java:351)

	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.getResponse(GatewayInterface.java:543)

	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:283)

	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.invokeWithTimeout(GatewayInterface.java:966)

	at com.inductiveautomation.factorypmi.application.script.builtin.ialabs.IALabsOPCFunctions.doBrowse(IALabsOPCFunctions.java:15)

	at com.inductiveautomation.ignition.common.script.builtin.ialabs.AbstractIALabsOPCFunctions.browse(AbstractIALabsOPCFunctions.java:25)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

	at java.base/java.lang.reflect.Method.invoke(Unknown Source)

	at org.python.core.PyReflectedFunction. __call__ (PyReflectedFunction.java:190)

	... 18 more

Caused by: java.net.SocketTimeoutException: Read timed out

	at java.base/java.net.SocketInputStream.socketRead0(Native Method)

	at java.base/java.net.SocketInputStream.socketRead(Unknown Source)

	at java.base/java.net.SocketInputStream.read(Unknown Source)

	at java.base/java.net.SocketInputStream.read(Unknown Source)

	at java.base/java.io.BufferedInputStream.fill(Unknown Source)

	at java.base/java.io.BufferedInputStream.read1(Unknown Source)

	at java.base/java.io.BufferedInputStream.read(Unknown Source)

	at java.base/sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)

	at java.base/sun.net.www.http.HttpClient.parseHTTP(Unknown Source)

	at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)

	at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)

	at java.base/java.net.HttpURLConnection.getResponseCode(Unknown Source)

	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.getResponse(GatewayInterface.java:437)

	... 27 more

Traceback (most recent call last):
  File "<input>", line 6, in <module>
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.newGatewayException(GatewayInterface.java:351)

	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.getResponse(GatewayInterface.java:543)

	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:283)

	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.invokeWithTimeout(GatewayInterface.java:966)

	at com.inductiveautomation.factorypmi.application.script.builtin.ialabs.IALabsOPCFunctions.doBrowse(IALabsOPCFunctions.java:15)

	at com.inductiveautomation.ignition.common.script.builtin.ialabs.AbstractIALabsOPCFunctions.browse(AbstractIALabsOPCFunctions.java:25)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

	at java.base/java.lang.reflect.Method.invoke(Unknown Source)

com.inductiveautomation.ignition.client.gateway_interface.GatewayException: com.inductiveautomation.ignition.client.gateway_interface.GatewayException: Read timed out

```

Could someone help?

---

<div class="post-metadata">

**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [February 8, 2024, 1:52pm UTC](https://forum.inductiveautomation.com/t/connection-error-when-trying-to-browse-opc-tags-from-opc-ua-server/85422/2 "2024-02-08T13:52:24Z")

</div>

It looks like you're trying to do this from a client/designer and the browse is taking too long.

Try using `system.opc.browseServer` instead - it doesn't do a recursive browse like `system.opc.browse` and `system.opc.browseSimple` do.

[https://docs.inductiveautomation.com/display/DOC81/system.opc.browseServer](https://docs.inductiveautomation.com/display/DOC81/system.opc.browseServer)