Save an image and generate Thumb with nodejs

I'm trying to burn an image to disk and after that generate a thumb of the image that was saved.

To do this I save the normal base64 image that was sent and in the callback of fs.writeFile I call the function to generate the thumb.

I'm trying to generate the thumb using the imagemagick package

const im = require('imagemagick');
const fs = require('fs');

const imagemCapa        = objetoFolder + "\" + comando.imagemCapa;
const imagemCapaThumb   = objetoFolder + "\capa_thumb.jpg";

//Grava no disco
fs.writeFile(imagemCapa, comando.imagemCapaBase64, 'base64', (err) => {
    if(err) console.log(err);

    //Thumb
    const optionsThumb = {
        srcPath: imagemCapa,
        dstPath: imagemCapaThumb,
        width: 262                                  
    };
    im.resize(optionsThumb, (err, stdout, stderr) => {
        if (err) console.log(err);
        console.log('Thumb gerado');
    });

});

I can burn the image to disk but it is not generating the thumb.

Who can help thank you in advance! A hug.