If you are seeing "Terminated due to an error" or stuck on "Received NAK" when you start the Mga Transfer Progress that is because the EVK-M101/C is set to the wrong mode. The EVK-M101 needs to be set to Mode 0, UART (In this selection, the EVK communicates with the receiver through the UART
interface and allows the use of the internal SPI flash memory, UBX-MGA-FLASH).
With the EVK-M101 or the EVK-M101C model look at the front of the device, you should see a switch labeled "mode" with the numbers 0, 1, 2 under the switch. Please move the switch to the number 0 (zero) and try your test again. See the screenshot below:
Refer to section 4.1.1 in the guide EVK-M10_UserGuide_UBX-21003949.pdf for more details.
If this does not work or you have already tried this and got no results please email us at services-support@u-blox.com