I am not sure if it is related to J-runner, drivers or X-Flasher, but I will write here.
So the problem is, my X-Flasher doesn't really work that good in eMMC mode. In this mode it constantly looses the connection with the console and crashes J-runner. Sometimes I manage to dump 2MBs of NAND, sometimes 4, sometimes 40, but very rarely it allows me to dump/write the full NAND.
I noticed that X-Flasher usually looses the connection (USB Drive becomes Removable Disk) as soon as or very shortly after I click on write or read the NAND.
Sometimes the console boots by itself while X-Flasher is dumping or writing the NAND and fans are spinning in a jet mode. J-Runner constantly crashes or writes hardware malfunction while dumping/writing in eMMC mode. It took me about two hours to dump and write the NAND.
SPI mode works like a champ.
X-Flasher - RevB.
J-Runner - 3.0.3b
Has anyone had this problem before?