Problems with Firmware update Eos R5 II 1.0.2.

XL+

XL+

When nothing is going right, go left
Canon Rumors Premium
Sep 15, 2016
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recently: The Tyrol, Austria
#1
Good evening!
Tried to update the firmware on my R5 Mark II to Version 1.0.2 (I did this for several times in the last decades)
Eos Utility did not allow to "downgrade" the Firmware (screenshot attached). Tried to redownload the FW from Canon DE three times.
Tried it via Memory card. Update was completed. BUT: Now the display shows an X in an red circle with "Err" below. It does not work anymore.
Can I try to do something or must I send it to Canon?

Thank you
 

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#4
That stinks, can you recall what the conditions were when you did the firmware update? Such as, you had only 1 card in the camera or both, had a lens on the body or no lens, etc. Just in case some physical condition went sideways. It may help others avoid this.
 
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#5
R5 MK II with SD-Card inside, CF-card removed. The RF100mm 2.8 Macro was attached. No button pressing, no moving of the body, no switches were touched when the Update was running.
Received critizism from Canon Service company, that I´ve tried to update by card when the Canon Eos Utility program shows an error. Well, I thought, if it is not working, this will be shown by the body too. So my fault.
I believe Canon will find the problem and solve it.
 
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#6
Thank you for posting that. I am not sure what you could or should have done with that error. I am sure they can fix it, they likely have some method of connecting to the camera and just loading the firmware. Too bad they don't share that with the community, would save a lot of time and headache for people in your situation.
 
Upvote 0
#10
XL+ said:
Good evening!
Tried to update the firmware on my R5 Mark II to Version 1.0.2 (I did this for several times in the last decades)
Eos Utility did not allow to "downgrade" the Firmware (screenshot attached). Tried to redownload the FW from Canon DE three times.
Tried it via Memory card. Update was completed. BUT: Now the display shows an X in an red circle with "Err" below. It does not work anymore.
Can I try to do something or must I send it to Canon?

Thank you
Click to expand...
I got about the same trouble than XL+ : when updating the firmware with a SD card, from 1.0.1, it was impossible to do it as there was then a pop-up message - as on your screenshot but on the R5 II screen - that it was impossible to downgrade the firmware to an older version than the one which was installed. I've subsequently reformatted (something to do and well mentioned in the Canon guidelines ) my SD card. After that, a new attempt was successful without any trouble when using my reflex.

As you, it's a long time ago that I started to update canon firmwares - the 1st was with a EOS 350D... - and I never got such a mess: something to do with Canon itself I fear...
 
Last edited:
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#12
Hello, I had the exact same issue when attempting to install the FW via Camera Connect. I saw on another forum to simply remove both cards (if using both) and attempt without the cards, this will prompt an error because it is looking for cards. After this, insert only the SD card (not type B) and then it will proceed with the transfer. I tried it and it worked for me. Odd bug, or bugs I should say. After the FW install, NONE of my assignable buttons that I registered to prompt 'subject to detect' would work, which was frustrating. I ended up doing a factory reset and that solved the issue, at least for now!
 
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