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I have such a problem:
I have got a calibration file called "test.cal" with the OptiTrack Point Cloud Calibration Tool and I can capture frames using this tool. On the other side, I down a sample project named "Validation Sample"(C#) from the offical website. But I can't capture any frames after loading profile("test.cal") into Validation.exe.
What should I do?

What is the symptom? GetFrame() always returns NULL?

Yes, GetFrame() always returns NULL. After loading the profile the value of the property NPPointCloudClass.CameraCount is 0.It seems that the cameras haven't been turned on. Are there anything I have to do before loading profile into the NPPointCloudClass?

I have solved the problem. The path of the profile ("test.cal") contains chinese charactor. So the NPPointCloudClass.LoadProfile() can not load the profile correctly.
Thanks a lot.