# system.opc.readValue config error

**URL:** <https://forum.inductiveautomation.com/t/system-opc-readvalue-config-error/34916>\
**Category:** Ignition\
**Created:** [May 20, 2020, 4:56pm UTC](https://forum.inductiveautomation.com/t/system-opc-readvalue-config-error/34916 "2020-05-20T16:56:44Z")\
**Posts on this page:** 1\
**Showing post:** 29

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**Author:** ![PRAMANJ](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pramanj/32/66935_2.png) [@PRAMANJ](https://forum.inductiveautomation.com/u/PRAMANJ)\
**Post date:** [May 23, 2020, 4:04pm UTC](https://forum.inductiveautomation.com/t/system-opc-readvalue-config-error/34916/29 "2020-05-23T16:04:11Z")

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I changed the security policy to None and saved the settings, but the same error. Do I need to restart to gateway server or OPC server?

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