The source file name (including the path, if
applicable) of the file. The accepted value of
this object is 'cfg1' or 'cfg2' when the requested
action is one of the following:
copyConfigFromFlashToRuntime(8), and
copyConfigFileFromFlashToHost(11).
The value of this object can not be changed when
the fileCopyResult object has the value of
inProgress(1).