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Originally Posted by Guyute
so heres my problem i'm trying to up load firmware and it keeps giving me this error "transfer data failed, unlock firmware failed...." i have already checked for dead batteries on the RCX and thats not the problem. are there any ideas out there for me? thanks.
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Three things,
Try changing to a different port for the tower and let software find it again. Enclose the RCX and tower in a box as there may be inteferring IR sources that interupt the data transfer. Remove the batteries for at least five minutes to let the memory drain all the way down, then try again.
I am of course assuming that the RCX hardware is compatable with the version of firmware you are loading. There are still some very early RCX bricks that are not able to load the more recent versions firmware.