# "Gateway Comm Mode is not Read/Write" error in clients?

**URL:** <https://forum.inductiveautomation.com/t/gateway-comm-mode-is-not-read-write-error-in-clients/16514>\
**Category:** Ignition\
**Created:** [January 8, 2018, 3:24pm UTC](https://forum.inductiveautomation.com/t/gateway-comm-mode-is-not-read-write-error-in-clients/16514 "2018-01-08T15:24:45Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jeffkrol](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jeffkrol/32/3339_2.png) [@jeffkrol](https://forum.inductiveautomation.com/u/jeffkrol)\
**Post date:** [January 8, 2018, 3:24pm UTC](https://forum.inductiveautomation.com/t/gateway-comm-mode-is-not-read-write-error-in-clients/16514/1 "2018-01-08T15:24:45Z")

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I have been noticing this problem on a big project of ours. Occasionally users of our client are reporting that sometimes when they click a button/field that executes a write to the PLC, they get an error that says “Gateway Comm Mode is not Read/Write”. Typically this is fixed by them just relaunching their client. Any idea what might cause this? I don’t really like telling the users to simply just “reboot the client”.

Thanks!

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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 8, 2018, 3:45pm UTC](https://forum.inductiveautomation.com/t/gateway-comm-mode-is-not-read-write-error-in-clients/16514/2 "2018-01-08T15:45:06Z")

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This is the same thing that happens in the Designer when you use the button up top to toggle between read-only and read-write, except in the client there’s no button, so you might have a script somewhere that is setting the mode (`system.util.setConnectionMode`).

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**Author:** ![jeffkrol](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jeffkrol/32/3339_2.png) [@jeffkrol](https://forum.inductiveautomation.com/u/jeffkrol)\
**Post date:** [January 8, 2018, 10:34pm UTC](https://forum.inductiveautomation.com/t/gateway-comm-mode-is-not-read-write-error-in-clients/16514/3 "2018-01-08T22:34:11Z")

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Kevin,

Wow. Thanks for the heads up. I searched through our project and found at least one instance of that command in a random popup. I got it fixed now! Thanks again.