Strange Error about ipwndfu

[axi0mX]

This error happens if you don't (successfully) restore a 24Kpwn IPSW to your device before using -x flag.

If you created the correct 24Kpwn IPSW in redsn0w, the filename should start with NO_BB_OLDROM_iPhone2,1.

Make sure you are following the guide:

https://github.com/axi0mX/ipwndfu/blob/master/JAILBREAK-GUIDE.md

[iosfritz]

But at step 2 you wrote in brackets that this step is only for old bootrom and i have the new one

[iosfritz]

And whats a 24kpwn how so I create this with redsn0w? :o

[axi0mX]

As the title says, the guide is for iPhone 3GS (new bootrom). You need to do everything in the guide. Read it and follow it step by step.