What are stock changes?

With the limited information, I can only take guesses. In general, it’s useful to provide a trace file to find out what happens before the error: How to start a trace analysis for a Novulo application to find bugs

Therefore, I cannot help with the first error. It’s a really generic error message.

The second error suggests that you haven’t configured a period for 2025 yet in your financial administration.

Also make sure to update M3009 to the latest CTP for improved error messages.