can you identify any difference between your files? Do their names all begin with that word "Data" - the rest shouldn't matter as you have an * - and are they all in .xls format?
That code you have should work. When you go through it in the Debugger, does that vDataFolder evaluate to a correct file_path?
Yes, they have the same extansion and all names begin from "Data". Maybe reason, that I have different "sub-load" for each these files, because they have the same data, but this data in different columns.
First (1) TAB :
let vDataFolder = '\Clients\Current';
FOR each vFile in Filelist ('$(vDataFolder)\Data*.xls')
IF (x= a) then
Else if (x= b) then