ive been using the 1.0 the content of the crash logs are


--------------------------------------------------------------------------------
[8/12/16 4:02 AM] KUAL (v. 2.7)

java.lang.RuntimeException: java.lang.NoClassDefFoundError: javax.swing.JButton
at ixtab.jailbreak.SuicidalKindlet.<init>(Unknown Source)
at ixtab.jailbreak.SuicidalKindlet.<init>(Unknown Source)
at com.mobileread.ixtab.kindlelauncher.KualKindlet.<i nit>(KualKindlet.java:46)
at com.amazon.kindle.kindlet.internal.kb.zdb(tpb:275)
at com.amazon.kindle.kindlet.internal.kb.KU(tpb:439)
at com.amazon.kindle.kindlet.internal.lifecycle.o.cal l(psb:412)
at edu.emory.mathcs.backport.java.util.concurrent.Fut ureTask.run(fw:491)
at edu.emory.mathcs.backport.java.util.concurrent.Thr eadPoolExecutor.IX(qr:959)
at edu.emory.mathcs.backport.java.util.concurrent.Thr eadPoolExecutor$Worker.run(qr:803)
at java.lang.Thread.run(Thread.java:989)
at java.lang.Thread.startup(Thread.java:1066)
Caused by: java.lang.NoClassDefFoundError: javax.swing.JButton
at com.mobileread.ixtab.kindlelauncher.ui.UIAdapter.c reateInstance(UIAdapter.java:35)
at com.mobileread.ixtab.kindlelauncher.ui.UIAdapter.< clinit>(UIAdapter.java:28)
at java.lang.Class.runStaticInitializers(Compiled Method)(Class.java:1604)
at com.mobileread.ixtab.kindlelauncher.KualKindlet.ge tUI(KualKindlet.java:269)
at com.mobileread.ixtab.kindlelauncher.KualKindlet.<i nit>(KualKindlet.java:152)
at ixtab.jailbreak.SuicidalKindlet.<init>(Unknown Source)
at ixtab.jailbreak.SuicidalKindlet.<init>(Unknown Source)
at com.mobileread.ixtab.kindlelauncher.KualKindlet.<i nit>(KualKindlet.java:46)
at com.amazon.kindle.kindlet.internal.kb.zdb(tpb:275)
at com.amazon.kindle.kindlet.internal.kb.KU(tpb:439)
at com.amazon.kindle.kindlet.internal.lifecycle.o.cal l(psb:412)
at edu.emory.mathcs.backport.java.util.concurrent.Fut ureTask.run(fw:491)
at edu.emory.mathcs.backport.java.util.concurrent.Thr eadPoolExecutor.IX(qr:959)
at edu.emory.mathcs.backport.java.util.concurrent.Thr eadPoolExecutor$Worker.run(qr:803)
at java.lang.Thread.run(Thread.java:989)
at java.lang.Thread.startup(Thread.java:1066)

What is your firmware version?

4.1.3 with a long build number

Now try that again please.

What is the error message?

What is the firmware version? include the details (actual characters) of: "a long build number".

We would not be asking just to waste your time, so don't waste ours.

An error ofcored main class instatiantation threw an RuntimeException Please contact the developer

Kindle 4.1.3 2692310002
Model B00E

This is a (cheap) used machine.
There is no way to know what has happened to it in the past.

Use KUBRICK (It is a 'sticky' thread here) on it to re-install a known good copy of the firmware.
(The image kubrick installs will already be jailbroken.)

Then try again.

Report results.

Hurray! she works! Thank you

I can't get'em wrong all of the time.

im curious can i do a firmware update or will that break MKK

Read Step #7 of the current jailbreak thread.

the wiki page that i used to jailbreak has nothing

https://wiki.mobileread.com/wiki/Kindle4NTHacking and for some reason i cant find it on here (have no idea what im doing)

Go here:
https://www.mobileread.com/forums/sho...d.php?t=275877

Now read step 7 in the first post.

You have a K4, so there is no bridge to preserve the jailbreak/MKK through firmware updates.

But then again, you have a K4, so the updates are not full system updates and won't delete the jailbreak/MKK to begin with. :)


tl;dr
You should never have to reinstall MKK. Ever.
Unless you do a factory reset + firmware update on 5.x devices. But you are never supposed to perform a factory reset, like, ever, so that shouldn't be a problem even if you had one of those devices. So again, no.

failed to install mkk
 

i have firmware 3.4.2, jailbreak, usbNetwork and some other hacks on my kindle 3 wifi.
installation of mkk fails.

log: