I'm developing a new module for opencart 1.5.6.4. Currently the admin view is complete and i need to store the value to database by creating a independent table. But, my model doesn't work. it shows the error "Call to a member function addModule() on a non-object". actually i made the module just like this :
http://code.tutsplus.com/tutorials/from-beginner-to-advanced-in-opencart-module-development--cms-21873
Please help.