Hello. I use this script to send the next request instead of creating a new request in the collection. I need to use variables in that URL, but I’m facing this issue, could anyone help me?
pm.test("Status code is 200", function () {
pm.sendRequest('{{url}}/albums/picture/63862864732648', function (err, res) {
pm.expect(err).to.not.be.ok;
pm.expect(res).to.have.property('code', 200);
pm.expect(res).to.have.property('status', 'OK');
});
});
Assuming you are using a csv/json file, in your prerequest script you can do:
pm.request.url = pm.iterationData.get('<name of column with your url>');
This will set the url for the request.
If you also need to set the method, you can do the same thing
pm.request.method = pm.iterationData.get('<name of column with the http method>');
It does not work 
You would need to reference the variable like this or using the specific variable scope:
pm.test("Status code is 200", function () {
pm.sendRequest(`${pm.variables.get('url')}/albums/picture/63862864732648`, function (err, res) {
pm.expect(err).to.not.be.ok;
pm.expect(res).to.have.property('code', 200);
pm.expect(res).to.have.property('status', 'OK');
});
});
Thanks 
it works