Recursive full paths fail in the filelist.csv and it throws an error saying that files don't match nr of rows. Basically, this check, still assume a correct (recursive) file listing was made.
https://github.com/bnasr/xROI/blob/1a7d3cee6f9afa7ee229b8adaa9a17fa483b132c/inst/app/app.R#L129