Cannot restore NVM backup from UZB FW5.37 SDK 6.81.1

Configuration Z-Wave
1

Hello community,

this is my first post - so I might miss some points.

I am running homeassistant in docker.
I used UZB since a while via Z-Wave JS and wanted to migrate.
My steps:

  1. creating a NVM backup. seemed to work - file size 256 kb
  2. changing setup (detach uzb, attach zwa-2, change docker compose…)
  3. In Z-WAVE JS, I see zwa-2 (made FW update to 1.1)
  4. NVM restore (skip compatibility check)

I get these messages in the log
2025-09-03 17:00:52.127 CNTRLR Restoring NVM…
2025-09-03 17:00:52.127 CNTRLR Turning RF off…
2025-09-03 17:00:52.144 CNTRLR Turning RF on…
2025-09-03 17:00:52.153 INFO Z-WAVE: The given data does not match the NVM size - cannot restore! (ZW0322) restoreNVM undefined

I tried already to upgrade UZB to FW5.39 - seems someone was successfull, but this didn’t work.

Tx for your suggestions.

Guido

2

Why did you disable the compatibility check? Did you try it with it enabled? If you skip the compatibility check the driver will not attempt to convert NVM formats.

1 Like
3

tx.that’s it. I skipped it, as I my understanding was, this is needed as it is an older controller…

4

It’s the opposite in fact.

Maybe “compatibility check” is not the best description of what it does, but disabling the check does a “raw” NVM restore (i.e. do not check compatibility!), while enabling the compatibility check does a conversion of the NVM if needed (e.g. from 500 source to 800 target).