PPK(Power Profiler Kit) desktop application sometimes won't start

[xvhongpeng]

Dear friends, My PPK works unstable. Sometimes it works well, while sometimes it won't start. When it is started from the command line console, the error output is "initialization failed, could not read calibration value". i am looking forward to your advices. Best Regards.

[xvhongpeng]

this problem still occurs.When it is started from the command line console, the error output is "initialization failed, could not read calibration value. i am puzzled about the PPK.