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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

I had the the problem with 3 different Pixhawks and 4 differend SD cards that all worked before updating the firmware. This problem has nothing to do with the SD card and is still not solved with 4.0.4.

I could solve it be completey overwriting all data on the Pixhawk (full reset). To do so, i flashed arduplane and then newest arducopter again because I could not find the terminal anymore in newer MP versions. The tab is just gone although I set Layout to Advanced. Docs seems not up to date anymore. Really annoying when the view of MP is changed but not updated in the help or docs sites.

So it must be an old parameter transfered from older to newer ardupilot versions that causes the problem.

I updated my pixhawk cube orange to 4.0.4 and getting logging failed , have a new formatted 8GB SD card , same problem pre arm fail due to logging failed error
Any Help would be greatly appreciated


Try another SD card.

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