systrace generates html failed everytime on my pc win7

[jsonhu]

trafficstars

Outputting Systrace results... Tracing complete, writing results Traceback (most recent call last): File "D:\Sdk\platform-tools\systrace\systrace.py", line 49, in sys.exit(run_systrace.main()) File "D:\Sdk\platform-tools\systrace\catapult\systrace\systrace\run_systrace.py", line 196, in main main_impl(sys.argv) File "D:\Sdk\platform-tools\systrace\catapult\systrace\systrace\run_systrace.py", line 193, in main_impl controller.OutputSystraceResults(write_json=options.write_json) File "D:\Sdk\platform-tools\systrace\catapult\systrace\systrace\systrace_runner.py", line 68, in OutputSystraceResults self._out_filename) File "D:\Sdk\platform-tools\systrace\catapult\systrace\systrace\output_generator.py", line 98, in GenerateHTMLOutput html_file.write(_ConvertToHtmlString(result.raw_data)) File "D:\Sdk\platform-tools\systrace\catapult\systrace\systrace\output_generator.py", line 120, in _ConvertToHtmlString raise ValueError('Invalid trace result format for HTML output') ValueError: Invalid trace result format for HTML output