Solved it!!!
Had to download the base game again and merged it with the latest update and it worked... don't know why it did not work with a custo XCI with the older update in it... Thank you for your help!!
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Thank you for your help, already posted the solution I used.
Just updated to master key 9 and still can't merge update 1.0.2 of yooka laylee with my custom XCI... it says thta NSCB failed to decrypt the header... :(
Thanx!
With V1.4 it does not show the error anymore but now it is asking for the NSP titlekey, but I'm not using the NSP I'm using a XCI... is that a bug or will I need the titlekey anyway?
Regards.