Invalid Coordinate or Range: '2A:1746C'

You are correct. '2A:1746C' is not a valid coordinate or range. In coordinate notation, a valid coordinate typically consists of a combination of letters and numbers representing a specific location on a grid or map. For example, a valid coordinate could be 'A4' or 'D12'. A valid range would consist of two coordinates representing a specific area on a grid or map. However, '2A:1746C' does not follow this format and is therefore not a valid coordinate or range.