win7 下使用 android 真机连接，报这个错，是什么回事呢？
1) macaca mobile sample "before all" hook:
[init({"autoAcceptAlerts":true,"platformName":"Android","udid":"177fc4b2","
pp":"C:\Users\weiqh\macaca-test-sample-master\app\android-app-bootstrap.zi
"})] connect ECONNREFUSED 127.0.0.1:3456
Error: connect ECONNREFUSED 127.0.0.1:3456
at Object.exports._errnoException (util.js:953:11)
at exports._exceptionWithHostPort (util.js:976:20)
at TCPConnectWrap.afterConnect as oncomplete

2) macaca mobile sample "after all" hook:
[quit()] connect ECONNREFUSED 127.0.0.1:3456
Error: connect ECONNREFUSED 127.0.0.1:3456
at Object.exports._errnoException (util.js:953:11)
at exports._exceptionWithHostPort (util.js:976:20)
at TCPConnectWrap.afterConnect as oncomplete
@xdf

报这个错，请问是什么原因啊？

macaca-cli-run:92:10 [master] pid:5856 Error: spawn C:\Users\weiqh\macaca-and
roid-test-sample-master\macaca-test\node_modules\mocha\bin_mocha.cmd ENOENT
at exports._errnoException (util.js:953:11)
at Process.ChildProcess._handle.onexit (internal/child_process.js:182:32)
at onErrorNT (internal/child_process.js:348:16)
at _combinedTickCallback (internal/process/next_tick.js:74:11)
at process._tickCallback (internal/process/next_tick.js:98:9)
at Function.Module.runMain (module.js:577:11)
at startup (node.js:160:18)
at node.js:449:3

Test completed!

@xdf 升级了之后，还是报同样的错误啊？怎么搞呀？