Fi[le filespec Loads a package that is saved in the file system as a .dtsx file. The filespec argument specifies the path ...

Fi[le] filespec

Loads a package that is saved in the file system as a .dtsx file. The filespec 
argument specifies the path and file name of the package. You can specify the 
path as either a Universal Naming Convention (UNC) path or local path.

If you use the File option in conjunction with any of the following options, 
DTUtil fails: 
o DTS 
o SQL 
o SrcUser 
o SrcPassword 
o SrcServer