5D3 Full Res Anamorphic 15 fps, camera shuts down when forcing more than 15 fps

[GanglyPit]

Friends i have a question. Is it possible to override the fps on this preset? ive been using the 5.7 mode for over 2 years and i love it but this mode (full res anamorphic) at 24fps would be awesome, but every time i try, camera shuts down after some seconds even when it says the recording speed it's fine with the recording thing in color orange.

Thanks everyone!

[Walter Schulz]

Low-level format cards in cam and retry.

[GanglyPit]

Done, still not working. Now when i enable fps override my camera freezes and i need to pull out the battery