Settings_save_one() return -2

[Chaoyue Ying]

settings_test.rar

I create a project to learn details of settings module and code as above.

When the code running ,I try to trigger settings_save_one to save data,the function return -2.

How can I repair it?

[Charlie]

Have you managed to test with the following official sample? If not, can you have a try?  It demonstrates usage of settings_save_one function.

zephyr/samples/subsys/settings 

[Chaoyue Ying]

I tried the settings sample,always some places I can not understand but almost settings_save_one() will run successfully.

So I don't know where is wrong.