What were you doing before you got the error, what kind of motherboard do you have, what dashboard/rebooter are you running...the list goes on. Just knowing you have an E71 doesn't help too much, especially on a JTAG, as it could be a lot of things. The few times I've gotten it it's due to a bad nand flash, either updating gone wrong or just a bad block that I don't notice the first time I write an image to the nand.