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MCUXPRESSO GUI Flash tool issue in Windows10

Question asked by Jeremy Geslin Employee on Apr 9, 2019
Latest reply on Apr 9, 2019 by LPCX presso support



We recently noticed issues using GUI Flash Tool inside MCUXpresso while running in Windows10 (also reported by several customer).

The operation fails with error "Nn(05). Wire ACK Wait in DAP access".

Below is the complete error log:

However it is possible, in the same conditions, to flash using the Debug function.


On some laptops the issue is 100% reproducible while on some others it is only observed when the CMSIS-DAP probe (on-board or LPC-Link2) is connected behind an USB hub.