BenMap New Grid Definition

Hi All,

I have a CAMx modeled data that I want to run in BenMAP. The data is for a 4x4 km domain with 281 columns by 299 rows. I tried to create a new grid definition in BenMap but the maximum columns and rows that I can create are 100 each. I was wondering if there is a way to solve this issue in BenMap or a software that I can use to create a grid with 281 columns and 299 rows. Thanks for your help !