I’m wondering if the headers in your data are not being parsed correctly (similar to this issues with another tool).
Extra spaces/tabs could also be a problem, anywhere in the file but likely in the first row. So check for those and fix. Tools in the
Text Manipulation and the
Select tool can help to clean up tabular data.
If needed, you can reformat the headers so that each data column has its label all as “oneword” – no internal spaces. Dashes might be ok, too, so that would be a column label formatted something like this “one-word-and-maybe-more”. Avoid starting any labels with a number, dash, or any other non-alphabetic character to avoid problems.
If you can’t figure out the issue, where are you working? Public Galaxy server (which URL) or someplace private?
If public, you could share the history with me (generate a link, making sure to check the box to also share the datasets) and send it back in a direct message. Or share it publically in this thread if you are Ok with that. If working at Galaxy Main https://usegalaxy.org, just send this in as a bug report from one of the error datasets and put a link to this post in the comments so we can associate the two).
Looking at the data in plain text here probably wouldn’t be enough. Especially if it ends up that we should consider having the tool handle data like yours better in the future. These wrappers are still somewhat new. Usage improvements will evolve over time, from feedback like yours