K4 FW 4.1.4, KUAL/MRPI problems

SpuntoTheRatBoy · 04-15-2025, 08:46 AM

Hello all,

I've got my K4 jailbroken (is that the correct participle?), I've got MKK and Python installed and screensavers working properly so I can use an image of my own creation, or use the cover of the last book.

I can't seem to get KUAL or MRPI working.

Following the instructions in the Install "KUAL itself" spoiler here it looks like I need to copy KUAL-KDK-1.0.azw2 from the legacy/non-coplate version in KUAL-v2.7.35-g2d06358-20250103.tar.xz into my documents, and then click on the resulting document in my library. But when I do that, I get an error:

An error occurred: Main class instantiation threw a RuntimeException. Please contact the developer.

I've also tried using the Booklet from the same tarball, Update_KUALBooklet_v2.7.35_install.bin in the USB root of the Kindle — the machine then claims to update successfully, but I can't see any difference once it restarts. And I also tried the corresponding file from the coplate version, KUAL-18b218e-20250103/Update_KUALBooklet_18b218e_install.bin, just in case, but the same thing happens. Should I be trying them in the mrpackages directory instead? But I think if KUAL isn't working then MRPI isn't either, right?

I've tried doing the ;log mrpi thing at various points in this process, and it's never done anything at all.

I wonder if maybe I have correctly installed KUAL, but I just can't find how to start it, and I'm flapping about like an idiot missing the obvious! I don't seem to have a Home screen distinct from the library, so the only menus I have are what I get when I click the physical menu button. I tried installing the KUAL Helper menu, and Ko Reader, and either they're not installed or I just can't see them.

The RuntimeException makes me think KUAL just isn't installed properly, though.

If anyone can see anything obvious that I'm doing wrong, or anything I should be checking or looking out for, I'd be really grateful for your help.

Thanks!

OctopusET · 04-18-2025, 07:42 AM

I have exactly same issue with you

Spezi · Yesterday, 01:24 PM

Similar issue here.

Jailbreak works using NiLuJes K4 1.8N version. Installing MKK from the same page works as well, but after that I am stuck.

I cannot open the KUAL document on my kindle, nor can I update it via the supplied .bin.

04-15-2025, 08:46 AM	#1
SpuntoTheRatBoy Junior Member Posts: 2 Karma: 10 Join Date: Apr 2025 Location: Brighton, England Device: Kindle Kindle4NonTouchBlack	FW 4.1.4, KUAL/MRPI problems Hello all, I've got my K4 jailbroken (is that the correct participle?), I've got MKK and Python installed and screensavers working properly so I can use an image of my own creation, or use the cover of the last book. I can't seem to get KUAL or MRPI working. Following the instructions in the Install "KUAL itself" spoiler here it looks like I need to copy KUAL-KDK-1.0.azw2 from the legacy/non-coplate version in KUAL-v2.7.35-g2d06358-20250103.tar.xz into my documents, and then click on the resulting document in my library. But when I do that, I get an error: An error occurred: Main class instantiation threw a RuntimeException. Please contact the developer. I've also tried using the Booklet from the same tarball, Update_KUALBooklet_v2.7.35_install.bin in the USB root of the Kindle — the machine then claims to update successfully, but I can't see any difference once it restarts. And I also tried the corresponding file from the coplate version, KUAL-18b218e-20250103/Update_KUALBooklet_18b218e_install.bin, just in case, but the same thing happens. Should I be trying them in the mrpackages directory instead? But I think if KUAL isn't working then MRPI isn't either, right? I've tried doing the ;log mrpi thing at various points in this process, and it's never done anything at all. I wonder if maybe I have correctly installed KUAL, but I just can't find how to start it, and I'm flapping about like an idiot missing the obvious! I don't seem to have a Home screen distinct from the library, so the only menus I have are what I get when I click the physical menu button. I tried installing the KUAL Helper menu, and Ko Reader, and either they're not installed or I just can't see them. The RuntimeException makes me think KUAL just isn't installed properly, though. If anyone can see anything obvious that I'm doing wrong, or anything I should be checking or looking out for, I'd be really grateful for your help. Thanks!

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04-18-2025, 07:42 AM	#2
OctopusET Junior Member Posts: 3 Karma: 10 Join Date: Apr 2025 Device: Kindle 5th	I have exactly same issue with you

Yesterday, 01:24 PM	#3
Spezi Junior Member Posts: 1 Karma: 10 Join Date: Apr 2025 Device: K4 silver no touch	Similar issue here. Jailbreak works using NiLuJes K4 1.8N version. Installing MKK from the same page works as well, but after that I am stuck. I cannot open the KUAL document on my kindle, nor can I update it via the supplied .bin.

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