As you've found, the WFF stage does not support wildcards so you'll need some other mechanism. How are your shell scripting skills? You could script something equivalent and then use an Execute Command stage to run it. Some other approaches inside DataStage are noted here and here.
-craig
"You can never have too many knives" -- Logan Nine Fingers
My first stage is to FTP the files to folder, second is checking whether the files came over to the folder, so using wait for file activity to watch for files if they appear my next process starts if not process ends and sends notification
Because of the underlying software DataStage uses, you can still use 'UNIX' scripts on a Windows DataStage server. That or replace all occurrences of "shell script" in my response with "batch file".
-craig
"You can never have too many knives" -- Logan Nine Fingers