Backup creation fails on RUT241 since firmware RUT2M_R_00.07.15

Networking Solutions
1

Hello, I get the following error when trying to create a backup from the command line on a RUT241 with firmware RUT2M_R_00.07.15 (or newer) directly after a factory reset:

BusyBox v1.34.1 (2025-06-04 10:34:44 UTC) built-in shell (ash)

    ____        _    ___  ____
   |  _ \ _   _| |_ / _ \/ ___|
   | |_) | | | | __| | | \___ \
   |  _ <| |_| | |_| |_| |___) |
   |_| \_\\__,_|\__|\___/|____/
-----------------------------------
    Teltonika RUT2M series 2025
-----------------------------------
   Device:     RUT241
   Kernel:     5.15.180
   Firmware:   RUT2M_R_00.07.15
   Build:      18a177b964b
   Build date: 2025-06-04 13:00:37
-----------------------------------
root@RUT241:~# cd /tmp/
root@RUT241:/tmp# sysupgrade -b backup.tar.gz
Thu Dec 11 17:40:51 UTC 2025 upgrade: Saving config files...
Failed to create the configuration backup.

root@RUT241:/tmp#

Firmware version RUT2M_R_00.07.14.3 was fine, RUT2M_R_00.07.18.3 is still affected.

Suspicious error messages when restoring backup on RUT241
3

This is madness, sysupgrade requires an absolute path and cannot cope with a relative path:

BusyBox v1.34.1 (2025-10-28 06:59:39 UTC) built-in shell (ash)

     ____        _    ___  ____
    |  _ \ _   _| |_ / _ \/ ___|
    | |_) | | | | __| | | \___ \
    |  _ <| |_| | |_| |_| |___) |
    |_| \_\\__,_|\__|\___/|____/
-------------------------------------
     Teltonika RUT2M series 2025
-------------------------------------
   Device:     RUT241
   Kernel:     5.15.186
   Firmware:   RUT2M_R_00.07.18.3
   Build:      ec1ef51550e
   Build date: 2025-10-28 07:44:31
-------------------------------------
root@RUT241:~# cd /tmp/
root@RUT241:/tmp# sysupgrade -b backup.tar.gz
Fri Dec 12 12:25:41 UTC 2025 upgrade: Saving config files...
Failed to create the configuration backup.

root@RUT241:/tmp# sysupgrade -b /tmp/backup.tar.gz
Fri Dec 12 12:25:50 UTC 2025 upgrade: Saving config files...

root@RUT241:/tmp#

The test was done directly after a factory reset.

Here is a RUT240 with latest firmware after a factory reset working just fine:

BusyBox v1.34.1 (2025-07-22 04:55:23 UTC) built-in shell (ash)

     ____        _    ___  ____
    |  _ \ _   _| |_ / _ \/ ___|
    | |_) | | | | __| | | \___ \
    |  _ <| |_| | |_| |_| |___) |
    |_| \_\\__,_|\__|\___/|____/
-------------------------------------
      Teltonika RUT2 series 2025
-------------------------------------
   Device:     RUT240
   Kernel:     5.4.291
   Firmware:   RUT2_R_00.07.06.19
   Build:      869421ab6a6
   Build date: 2025-07-22 06:03:22
-------------------------------------
root@RUT240:~# cd /tmp/
root@RUT240:/tmp# sysupgrade -b backup.tar.gz
Updating profile default
Tue Jul 22 05:07:57 UTC 2025 upgrade: Saving config files...
root@RUT240:/tmp#
Suspicious error messages when restoring backup on RUT241
4

Greetings,

Do you still need any assistance, or has the issue been resolved after performing the factory reset?

Best Regards,
Justinas

5

Nothing has been resolved, please read more closely. sysupgrade is broken on RUT241 with current firmware while it works fine on a RUT240 with a previous firmware generation. I tested everything right after a factory reset to rule out any side effects from a custom router configuration and so that you can easily reproduce on your end.

6

Greetings,

Sorry for the delayed response.

This issue has been relayed to our research and development department, once I get feedback from them, I will get back to you.

Best Regards,
Justinas

7

Any updates? This issue has not been resolved …

8

Greetings,

I am still waiting for an update from our R&D team. As soon as I receive more information, I will let you know.

Thank you for your patience.

Best Regards,
Justinas

9

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