I put in this formula
concat(Name[Number = substring(Journal Date, 6, 2)], " ", substring(Journal Date, 1, 4))
and when I try to verify it, I get this error.
"xdXDocument:GetDOM("month")/Months/Month/Name/dfs:dataFields/my:SharePointListItem_RW/my:Date" does not point to a valid location path of a field or group.