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USB communication failure with ULINKPro

Recently, I bought ULINKPro debugger. I tried to use that. It showed me USB communication failure.

I am confused that whether it is my CPU USB problem or ULINKPro USB problem..

Upto flash downloading working fine but when tried to enter into debug mode, it is showing Cannot access target, Shutdown debug session.

On command window, it is showing error57:illegal address access..USB communication failure.

I have searched for that error and I have put correct flash algorithm and flash download setting, but problem not resolved.

Why there is illegal address accessing....the same program with the same settings worked well for JLink adapter..

Anyone have idea..??