Diagnostic file by PC SDK

Good afternoon!
I try to test Controller. SaveDiagnosticsInfoToController in C# on VC. I have error:

RobApiException: C0048403 : The service is not supported in this version of the controller.

Is it because I use VC or maybe I do something wrong? On this moment I cannot test it on real controller.

public void SaveDiagnosticsInfoToController(
	string dignosticsFileName
When I write any diagnosticsFileName it means that new file will be created on controller in Home directory or root directory?

Thank you