R4i-SDHC 3DS card not working - "An error has occured."

the r4 needs to have an update file run on it BEFORE you update the console, otherwise it gets blocked.

 

Unfortunately it's already blocked. He updated the 3DS to v.7.2 thinking his R4 will work out of the box without pre-updating it ahead of his 3DS. He'll have to find an older NDS/DSi console that still could be use to run his R4 to perform the upgrading before getting to play on his 3DS again. If none is at his disposal, then .......

 

did you run an update .nds file or just copy the kernel files to the microsd?

 

Doing so didn't update the R4's firmware. You should have launch it through your 3DS.
It's like what you're suppose to do when you first bought the cartridge.
Find an older console NDS/DSi/3DS running your previous version. Run the installation setup for the upgrade file already in the SD Card.
You'll then get to use the R4 on your own 3DS again. On condition there really is an upgrade for your R4 to run on v.7.2.
Else it'll still be blocked until an update is made available.

 

its a bit confusing (I blame poor choice of terminology in the early days of flashcarts), but there are actually TWO different so-called 'firmwares' on a flashcart. One is stored on the microsd and is updated simply by overwriting files with newer ones. This isn't really a firmware, it's more properly called a kernel, and it's what is responsible for the cart's compatibility with roms.

The other, actual, firmware is internal to the cart, and is updated by running a program (a special .nds file for example). This firmware is what controls the compatibility with consoles and bypasses the blocks imposed by the console firmware updates.

 

Yes. Make sure you've added the correct file meant for your R4, since 1 brand could release several product line. Do back up the originals before hand, and make sure the console battery been fully charged. You won't want it flat before the upgrading complete.

 

it needs to be downloaded from the manufacturer's site for your exact R4 cart. Using the wrong one will brick the cart.

 

Just because it had been tested and running on NDS Lite doesn't mean it will run on 3DS v.7.2.0!
NDS Lite don't block the use of flash cartridges, so naturally it will run just fine, despite that same cart is blocked by the 3DS.
When we told you to use an older NDS console, it is to do the upgrading. We know it will work on the NDS Lite, so what you did;
test run on NDS Lite isn't the point of running the cartridge there. We want you to use it to perform the upgrading process which
you didn't do when it was still working on that now upgraded 3DS you can't use.

Follow the installation/upgrade instructions provided by that website. And make sure to back up the original files to your computer!

According to the website;
You have to choose the "GEAR" icon, and then choose "UPGRADE", and then press "START".
Allow process to compete, which takes at least 5 minutes or longer. Don't switch off console part way.
Make sure when you restart the R4 cartridge on the NDS Lite, the left bottom side shows "v.1.79b".

The problem here is that v.1.79b is said to make the cart compatible/work with 3DS v.7.1.0. I'm not even sure it will run on 3DS v.7.2.0. If it doesn't, you're out of luck.

 

I'm not entirely sure if your cart is one that has firmware upgrade for it to run on v.7.2.0 or not. What mentioned there is it can run on v.7.1.0. All I know is v.7.2.0 doesn't block the use of flash cartridge that had been pre-installed with firmware for it to run on v.7.1.0. Whether its a fault on your part or not, doesn't quite matter. The fact is the 3DS been upgraded to v.7.2.0, while the R4 hasn't been upgraded or at least checked if it will have no problem running on it. Clearly it couldn't work, so you'll need to find solution.