# OPC conection fail

**URL:** <https://forum.inductiveautomation.com/t/opc-conection-fail/16306>\
**Category:** Ignition\
**Tags:** ignition78\
**Created:** [December 12, 2017, 8:54pm UTC](https://forum.inductiveautomation.com/t/opc-conection-fail/16306 "2017-12-12T20:54:59Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![anibal.marquez](https://avatars.discourse-cdn.com/v4/letter/a/e68b1a/32.png) [@anibal.marquez](https://forum.inductiveautomation.com/u/anibal.marquez)\
**Post date:** [December 12, 2017, 8:54pm UTC](https://forum.inductiveautomation.com/t/opc-conection-fail/16306/1 "2017-12-12T20:54:59Z")

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After a power outage, I had an error in the OPC-UA server on devices.

Connecting Error: hide Details  
java.lang.Exception: Error during connect.  
com.inductiveautomation.xopc.driver.api.AbstractIODelegatingDriver.connect(AbstractIODelegatingDriver.java:591) etc.

some ideas?