When files are processed by SAP PI/SAP PO, you can decide to add or not a timestamp to the processed file. If you want to re-process the file, it is better to remove the timestamp before.
This command line tool can remove the timestamp of a specified file or remove the timestamp of all files presents in a directory.
With Directoryname, remove all the timestamps of the files presents in the directory.
With FileName, remove the timestamps of the specified file.