NoMethodError: undefined method `row' for nil:NilClass

[AbhisekGIT]

I was just trying the example for adding the border:

sheet.add_border 'B2:D5', { edges: [:bottom, :right], style: :thick, color: 'FF0000' }

But, I got error:

NoMethodError: undefined method row' for nil:NilClass from /dependencies/bundle/ruby/2.3.0/gems/axlsx-2.1.0.pre/lib/axlsx/workbook/worksheet/worksheet.rb:721:in range'

Whats wrong?

[AbhisekGIT]

Sorry, I messed with the row count. So, B2:D4 works.