尝试将文件活动模板与Instruments一起使用时出错。我这样做：
instruments -t "File Activity" -D ./traces -p $my_pid &
我收到以下错误：
instruments[33281]: [error] Failed to load template 'file:///Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Instruments/PlugIns/templates/File%20Activity.tracetemplate':
There is a missing instrument in this document that can't be recovered.
还有其他人对此模板有好运吗？是否可能不再支持？