A frequent error I see with users is that they forget to put quotes around string inputs.
Hi @jgould I will pass this to the Product team for consideration. Thanks for your input. In a week or so there will be a new section in the forum reserved for feature requests. I will move this post there. It will seem like it disappeared while we are doing the transition, but it hasn't and will show up again in the new section soon.
I think this is a duplicate of https://gatkforums.broadinstitute.org/firecloud/discussion/12322/do-not-require-quoting-string-variables-in-the-user-interface#latest