CMK version: 2.4.20 OS version: Appliance 1.7.14 Error message: Reset deprecations scheduling" failed -| Traceback (most recent call last): -| File "/omd/sites/NanoBiophotonics/lib/python3/cmk/update_config/main.py", line 271, in update_config -| action(logger) -| File "/omd/sites/NanoBio…

The update mechanism is hitting a file containing at least one null byte. This can happen, if your server crashed or the file system filled up entirely or similar events. Look for the relevant files in the file system and remove them, then the error should be gone.

Well, you are looking for files, which contain a null byte character (or are effetively empty). If you punch that into your favourite search engine, I am sure you will find a few options to find those files. :slight_smile:

CheckMK Appliance upgrade: Syntax error in step 42

Troubleshooting

StefanKaerst (Stefan Kärst) July 17, 2026, 7:44am 3

Hi @robin.gierse

which are the relevant files? where/how do I find them?

I did an upgrade to 2.4.0p34.cre but this error is always shown since the last 3 or 4 site upgrades .. probably because of deleting background jobs (or more) suggested somewhere else.

Regards