I had the wrong file extension. Changing to .xlsx allowed program to run. I am trying to read certain cells in 100+ separate .xlsx documents and then dump those values into a single excel document (or really any format, i.e. .xls, xlsx, .csv) that I can then analyze the values. Is there further documentation other than that readily viewable on the CPAN site? Maybe the issue is I just don't know enough perl to tackle this. But it would be so useful so I keep pressing on. It's like I can see all the modules and their usefulness but I can't tie them together.