# First uplink fine, second fails with "Drop uplink message - Device not found"

**URL:** <https://www.thethingsnetwork.org/forum/t/first-uplink-fine-second-fails-with-drop-uplink-message-device-not-found/38910>\
**Category:** The Things Stack v3\
**Created:** [July 31, 2020, 10:50am UTC](https://www.thethingsnetwork.org/forum/t/first-uplink-fine-second-fails-with-drop-uplink-message-device-not-found/38910 "2020-07-31T10:50:09Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![arjanvanb](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/arjanvanb/32/46626_2.png) [@arjanvanb](https://www.thethingsnetwork.org/forum/u/arjanvanb)\
**Post date:** [July 31, 2020, 11:06am UTC](https://www.thethingsnetwork.org/forum/t/first-uplink-fine-second-fails-with-drop-uplink-message-device-not-found/38910/2 "2020-07-31T11:06:16Z")

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> [@ms\_theloop](#):
>
> The OTAA info is saved in non-volatile memory.

You’ll need [to save much more](https://www.thethingsnetwork.org/forum/t/how-to-persist-lmic-otaa-parameters-with-an-esp32/35032/12). Your raw payload [shows](http://runkit.io/avbentem/lorawan-packet-decoder/branches/master?data=QEyAgQAAAAAKaat2QnElaPq6C7R63kB7p1YmpXlRSQ==) the uplink is using frame counter 0, for its 2nd uplink. That smells? Of course, if that’s causing this then the error message is not quite helpful…

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