I have entered two .txt files in to the history, but when I go to "Join two datasets side by side", only one of the files is entered twice. There appears to be a pulldown menu, but this also only list the one file. How can I get both files to be entered?
tabular format to both datasets for the tool form to recognize them as potential inputs. I just used this tool yesterday at Galaxy Main https://usegalaxy.org without problems, so unless you are working somewhere else, there are no known tool issues.
After doing that, and you still have problems, let us know.
Thanks! Jen, Galaxy team