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Prearm logging failed and no logs with the version 4.0.3

Hello . After upgrade of my arducopter from 4.0.1 to the last 4.0.3 , I receive the error message "Prearm: logging failed . Moreover , trying to access the logs with the button “Download Dataflash logs …” , the system tells me there are anything on the SD card, when in fact it contains old recorded logs.
I got around the problem by removing the option “Logging available” in the ARMING_CHECK to make a flight , but no logs has been recorded.

Returning to the 4.0.1 is okay , the message is gone and I can see my old logs.
I specify that I use a pixhawk 2.4.8.
But the problem is that without correcting this error of this new version, it’s not recommended to upgrade and fly safe without being able to analyze the incidents.
Thanks !!

Can you try 4.0.4-rc2? Can you post one of your .bin files?

Updating to 4.0.4 rc2, the problem has disappeared , but returning to the 4.0.3 too.
I don’t know what’s happened because my first update try has correctly finished . Maybe a bad reset of a component on the pixhawk (?). Sorry ,you can therefore close the incident and I will continue my tests with the 4.0.4 rc2.

As a side note, this is a good sign to format the sd-card or replace it

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