The error message should contain much more than that, including a file name and line number. It is impossible to help you with this much information. But if you can provide the complete error details, perhaps we could try to see what the cause of the problem may be.
Hi, error 1 : check is not defined
=> meteor add check error 2 :
var product = Products.bycodigo(codigo); // Products is not defined
=> var product = ProductList.bycodigo(codigo); error 3 : at [object Object].Meteor.methods.addToCart (meteor://app/lib/shopping_cart.js:64:35)
(line 64, column 35)
=> var product = ProductList.byCodigo(codigo); error 4 : Error: Products is not defined
I20151013-14:15:44.785(7)? at [object Object].Meteor.methods.saveCart (meteor://app/lib/shopping_cart.js:118:22)
=> replace all Products => ProductList
That all.Sorry, about my english