# OPC Write Error **URL:** \ **Category:** Ignition\ **Created:** [April 20, 2018, 2:08pm UTC](https://forum.inductiveautomation.com/t/opc-write-error/17789 "2018-04-20T14:08:38Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![rgarcher](https://avatars.discourse-cdn.com/v4/letter/r/8baadc/32.png) [@rgarcher](https://forum.inductiveautomation.com/u/rgarcher)\ **Post date:** [April 20, 2018, 2:08pm UTC](https://forum.inductiveautomation.com/t/opc-write-error/17789/1 "2018-04-20T14:08:38Z")
I have an OPC connection to a camera that is working fine. However, when I write a value to a boolean OPC tag from a boolean OPC tag for this device (SICK camera), I get the following error from Ignition. “10:05:20.568 [AWT-EventQueue-2] ERROR com.inductiveautomation.ignition.designer.sqltags.util.TagUtilities$WriteListener - Error writing to Download.Value: The server not does support writing the combination of value.” I’ve also tried to write directly to the opc path using a script on a button and that does not work either. However, if I go into Kepware and write a 1 to the tag, it works fine. If I try to do a read from Ignition on the tag, I get the following: “[COLAS00077, Ignition OPC-UA Server] [null, [Bad\_AttributeIdInvalid] The attribute is not supported for the specified Node., Fri Apr 20 10:01” Any ideas?? ---
**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:** [July 26, 2019, 5:01pm UTC](https://forum.inductiveautomation.com/t/opc-write-error/17789/2 "2019-07-26T17:01:05Z")
4 posts were split to a new topic: [Error writing to Siemens tag](https://forum.inductiveautomation.com/t/error-writing-to-siemens-tag/26911)