Issue with 'No algorithm found'

Dear Forum Users,

I've bought a MIMXRT1050-EVK board and started out with the uVision MDK by Keil. I've managed a few simple demos so far but have now inadvertently changed something and they can no longer be downloaded (rebuild works fine). I get the following error:

Load "sdram_debug\\emwin_gui_demo.out"
No Algorithm found for: 00000000H - 0000FFFFH
No Algorithm found for: 00010000H - 0001E733H
Erase skipped!
Error: Flash Download failed - "Cortex-M7"
Flash Load finished at 17:29:53

I'm using the USB lead to program this board using the CMSIS-DAP debugger which is selected in <options>/<debug>

I've had this example running before but am now lost as to what has changed. I have moved the SW7 settings on the board but they are back as off-on-on-off again - this controls where the board boots from.

The board apparently has different RAM areas:
64MByte Hyperflash
32MByte SDRAM
8MByte QSPI Flash
SD Card slot

512kByte onchip SRAM (on the i.MXRT1050 chip).

any pointers would be really appreciated.

Rod

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