child_process.spawn() uncatchable error

[doivosevic]

After calling

try {
    child_process.spawn('kill ' + pid + ';screen -d -m -L node ' + serverjsLocation);
}
catch (e) {
    filelog(e);
}

I get

events.js:141
      throw er; // Unhandled 'error' event
      ^

Error: spawn kill 11088;screen -d -m -L node /home/git/Gitorade/server.js ENOENT
    at exports._errnoException (util.js:874:11)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:178:32)
    at onErrorNT (internal/child_process.js:344:16)
    at doNTCallback2 (node.js:439:9)
    at process._tickCallback (node.js:353:17)

Node version is 4.2.1
I added try block after I started getting this error so that I might debug it.
Is this the proper way to catch this exception?
The docs (https://nodejs.org/api/child_process.html#child_process_child_process_spawn_command_args_options) do not mention callback although this is an async function. How so? I went throught nodejs internal code and while I did not get too into it I got a feeling that the function is expected to have a callback.

How do I catch this error?

[fl0w]

ChildProcess is an EventEmitter. You'll want to hook/handle error events, specifically you'll want to handle the error event. Have a look.

[newtondev]

var child = child_process.spawn('kill ' + pid + ';screen -d -m -L node ' + serverjsLocation);
child.on('error', function(function (err) {
console.log('Failed to start child process.');
});

[doivosevic]

Thanks a lot guys! Should have read the docs more thoroughly..