# Write to tag from 7.9.21 to 8.1.42

**URL:** <https://forum.inductiveautomation.com/t/write-to-tag-from-7-9-21-to-8-1-42/100555>\
**Category:** Ignition\
**Created:** [January 7, 2025, 6:47pm UTC](https://forum.inductiveautomation.com/t/write-to-tag-from-7-9-21-to-8-1-42/100555 "2025-01-07T18:47:25Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Jonathan](https://avatars.discourse-cdn.com/v4/letter/j/aeb1de/32.png) [@Jonathan](https://forum.inductiveautomation.com/u/Jonathan)\
**Post date:** [January 7, 2025, 6:47pm UTC](https://forum.inductiveautomation.com/t/write-to-tag-from-7-9-21-to-8-1-42/100555/1 "2025-01-07T18:47:25Z")

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I am trying to write to a tag through the gateway network from a 7.9.21 gateway to a 8.1.42 gateway and I am getting the error

> Error writing to test.Value: Exception occurred on remote machine, error code=GENERAL\_PROTOCOL\_EXCEPTION [100]

The tag is a memory tag on the 8.1.42 gateway with read only set to false. I have tried resetting the gateway network connection, saving the tag provider configuration, and also rebooting each of the gateway servers. Any ideas on what is causing this?

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**Author:** ![MMaynard](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mmaynard/32/3366_2.png) [@MMaynard](https://forum.inductiveautomation.com/u/MMaynard)\
**Post date:** [January 7, 2025, 8:14pm UTC](https://forum.inductiveautomation.com/t/write-to-tag-from-7-9-21-to-8-1-42/100555/2 "2025-01-07T20:14:14Z")

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Compatibility issue. Pretty sure you can't write from 7.9x to 8.1x  
You could set up messaging and write that way.

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**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:** [January 7, 2025, 8:16pm UTC](https://forum.inductiveautomation.com/t/write-to-tag-from-7-9-21-to-8-1-42/100555/3 "2025-01-07T20:16:33Z")

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Hmm, I thought you could read and write, but not edit.

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**Author:** ![MMaynard](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mmaynard/32/3366_2.png) [@MMaynard](https://forum.inductiveautomation.com/u/MMaynard)\
**Post date:** [January 7, 2025, 8:18pm UTC](https://forum.inductiveautomation.com/t/write-to-tag-from-7-9-21-to-8-1-42/100555/4 "2025-01-07T20:18:43Z")

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I've never had success writing, reads are fine.  
Was a permissions issue with the GN and how it does remote permissions AFAIKR