Node.js convert between word file to pdf

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Node.js

AngularJs

hello

i'm use angular-file-upload
to upload word files doc and docx

but i want to convert those types to pdf file

like this

var unoconv = require('unoconv');

unoconv.convert(file.path, 'pdf', function (err, result) {
    console.log(err);
    fs.writeFile(path + "CVs/" + userID + ".pdf", result, function (err) {
        if (err)
            res.send({ success: false });
        else
            res.send({ success: true });
    });
});

but i'm got error

see this error