# Cannot find tags under MQTT Engine?

**URL:** <https://forum.inductiveautomation.com/t/cannot-find-tags-under-mqtt-engine/19857>\
**Category:** Ignition\
**Created:** [September 27, 2018, 1:02pm UTC](https://forum.inductiveautomation.com/t/cannot-find-tags-under-mqtt-engine/19857 "2018-09-27T13:02:33Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![uwe](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/uwe/32/6039_2.png) [@uwe](https://forum.inductiveautomation.com/u/uwe)\
**Post date:** [September 27, 2018, 1:02pm UTC](https://forum.inductiveautomation.com/t/cannot-find-tags-under-mqtt-engine/19857/1 "2018-09-27T13:02:33Z")

</div>

I verified that Edit-\>Find/Replace in Ignition Designer will find tags eg. GatewayAddress under System.

But, it seems limited to matching the leaf nodes in your tag hierarchy. I tested several cases with no success.

Nothing I type in for Tag Path in Tag Browser Search does anything.

If I have 1000 (or 1 million) different devices with different serial numbers, how can I find the  
tag “X” for one of them?

Thank you for any help.