I try to use OSBDM to debug Keil's demo code, but Keil couldn't connect to the target with some error message says "Error Flash Download failed - Target DLL has been cancelled" as shown in the attched screen capture. I installed the driver for OSBDM and it is correctly enumnated as shown in the bottom right corner of the screen shot. The OSBDM firmware has been updated to ver31.21.
Does anybody have the same issue? What could be wrong?
Thanks in advance,