Updating RT-N66U to recent release fails.

[Andreas Gohr]

I am currently running Asuswrt-Merlin 378.56_2 and want to upgrade to the most recent release . However after uploading the RT-N66U_380.67_0.trx file, I only get the following error message:

Firmware upgrade unsuccessful. This may result from incorrect image or error transmission. Please check the version of firmware and try again.​

I checked the checksum to make sure the download wasn't corrupted. All fine. After some googling I found this thread about a change in the verification system: https://www.snbforums.com/threads/asus-firmware-will-change-the-verification-method.32357/

However I'm unsure what the proper way to fix the problem is. Can someone give a noob-compatible step by step explanation on how to upgrade from Asuswrt-Merlin 378 to 380? Preferably without having to factory reset.

Thanks a lot.

 

[mstombs]

You shouldn't be afraid of resetting, you will need to do that at some point - you are attempting to jump several versions, including the sdk 378 to 380, you could try going to 380.59 which I think was the last before the verification update.
Do take a look at John's nvram utility which intelligently keeps useful variables https://www.snbforums.com/threads/user-nvram-save-restore-utility-r24a.19521/

 

[Michael Clifford]

I am currently running Asuswrt-Merlin 378.56_2 and want to upgrade to the most recent release . However after uploading the RT-N66U_380.67_0.trx file, I only get the following error message:

Firmware upgrade unsuccessful. This may result from incorrect image or error transmission. Please check the version of firmware and try again.​

I checked the checksum to make sure the download wasn't corrupted. All fine. After some googling I found this thread about a change in the verification system: https://www.snbforums.com/threads/asus-firmware-will-change-the-verification-method.32357/

However I'm unsure what the proper way to fix the problem is. Can someone give a noob-compatible step by step explanation on how to upgrade from Asuswrt-Merlin 378 to 380? Preferably without having to factory reset.

Thanks a lot.

I have an N66 and am contemplating an upgrade (from 376.47). Please keep us informed.

Good luck