The stack ID of the stack member for which files will be displayed in the FileViewer table. For devices that are not capable of being stacked, this variable will always read as 1, and will cause an error on being written to with any value other than 1. Write this variable with the stack ID of the stack member for which a view of files is required. If the stack member doesn't exist, an error will be returned. For a chassis switch, it corresponds to the card ID. For VCStack Plus, 1-12 refers to the cards on VCS stack member 1 and 13-24 refers to the cards on VCS stack member 2. Refer to chassisMappingTable for more details. Note that the other variables specifying the files to view will not be altered by changing the stack ID, which means that the file view table could be empty if a non-existant device or path has been referenced previously.