While Command File Specification

Reference:        While/End_While 

This field captures the file name associated with the Next, Folder, and List forms of the While loop.  It is used as the mask to generate the list of files for the Next parameter or the list of folders for the Folder parameter.  It provides the name of the file to be processed sequentially for the List parameter.  The Browse button allows you to search any Beyond FTP system for the appropriate name.  Masks may include a server name.  Lists must be local.