i have a pattern that calls for lion brand yarn cotton ease. alot of the colors I wanted are discontinued. So I substituted for the Martha Stewart lion brand but it is the same weight but wool/acrylic. will this throw my pattern off any?

What are you making? Do you have a link for the pattern? We would have to see the pattern first and look at the recommended gauge to give you a good answer.

Which one of the Martha Stewart yarns are you subbing? If it’s a worsted weight, it will be fine.