Alright this is simple if you're getting exception errors that's an issue with your OS as this works fine for me on Windows XP Professional. Make sure you have the latest updates for .NET Frame work 3.5.
Edit: Make sure you're using the latest versions of both software' mentioned.
For educational and developmental purposes only:- Dump your box's nand with nandpro
- Dump it again with nandpro (rename the first one so you know which is which)
- Get the kv/config using nandpro on your dumped nand.
- Open up Xnandhealer gui rename both of your boxes dumps to whatever it shows up as on the list.
- Make sure they match, it will let you know if you renamed them accordingly. (Might have to restart program)
- IF they match, then have Xnandhealer gui fix the first one (the one you will use).
- Once fixed, use BadBlock Remapper to load your 'fixed' nand dump, then once loaded for the zero config file (other nand file) load your custom nand (xbr,freeboot, etc) and it should remap all bad blocks from your dumped nand to this new custom nand.
- Make sure you injected your kv/config to the custom nand too.
Then you should have a working custom nand and should boot fine.
Let me know how it works for you.
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Thanks a load for your answer it is appreciated and I will update everyone on how it goes. Thanks