Since we know that Excel urps over numbers bigger than 15 or 16, I might recommend changing the length to be less than 32, but it's up to you. You know your data. I still think that using TAGATTR to specify the column as TEXT would have worked too.
Good news: We've extended SAS Hackathon registration until Sept. 12, so you still have time to be part of our biggest event yet – our five-year anniversary!