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I get this message on the MCB2140 eval kit when trying to use ULINK JTAG. Flash programming works fine. Any ideas.
I have the same since I migrate to Windows10 with Keil µVision5 + MDK256. With my register I can generate project but It is no possible to debug it.
See:
"LICENSE: R003(0) Security key not found"
https://developer.arm.com/documentation/ka004190/latest
Btw, I recommend upgrading to our latest release, which today is: MDK 5.35
http://www2.keil.com/mdk5