Node.js as service, exec doesn't work

问题

I'm running Node.js project as service using nssm. When user clicks button on my nodejs website it should run require('child_process').exec('cmd /c batfile.bat', function({ res.send(somedata); }); but instead it just skips running bat file and jumps to res.send(somedata). Why is that? When I run Node.js using cmd and npm start server.js it works fine. How can I make exec work while running nodejs as service?

Edit, some code:

require('child_process').exec('cmd /c batfile.bat', function(){

        var log = fs.readFileSync('logs/batlog.log', 'utf8');
        var html = fs.readFileSync('logs/batlog.htm', 'utf8');
        var json = {"log": log, "html": html};
        res.send(json);   

      });

and the batfile.bat is supposed to generate those 2 files but it just doesn't if I run nodejs as service.

来源：https://stackoverflow.com/questions/33946992/node-js-as-service-exec-doesnt-work