Unknown Error

[naccarati]

I'm trying to execute karma test with jasmine on firefox. I installed karma-firefox-launcher and was working before, but now I'm getting a strange error:

{ [Error: spawn UNKNOWN] code: 'UNKNOWN', errno: 'UNKNOWN', syscall: 'spawn' } Error: spawn UNKNOWN at exports._errnoException (util.js:870:11) at ChildProcess.spawn (internal/child_process.js:298:11) at exports.spawn (child_process.js:362:9) at Object._execCommand (C:\stash\scripts\node_modules\karma\lib\launchers\process.js:63:21) at Object._start (C:\stash\scripts\node_modules\karma-firefox-launcher\index.js:96:10) at Object.<anonymous> (C:\stash\scripts\node_modules\karma\lib\launchers\process.js:14:10) at emitOne (events.js:82:20) at Object.emit (events.js:169:7) at Object.start (C:\stash\scripts\node_modules\karma\lib\launchers\base.js:42:10) at C:\stash\scripts\node_modules\karma\lib\launcher.js:94:17 at next (C:\stash\scripts\node_modules\karma\node_modules\batch\index.js:118:7) at Batch.end (C:\stash\scripts\node_modules\karma\node_modules\batch\index.js:154:5) at launch (C:\stash\scripts\node_modules\karma\lib\launcher.js:111:11) at invoke (C:\stash\scripts\node_modules\karma\node_modules\di\lib\injector.js:75:15) at Server.<anonymous> (C:\stash\scripts\node_modules\karma\lib\server.js:171:24) at Server.g (events.js:260:16)

Any one know what can be?

Thanks a lot!