DT[S package Loads a package using the SSIS Service. The package argument specifies the folder and name of the package to ...

DT[S] package  Loads a package using the SSIS Service. The package argument specifies the folder and name of the package to retrieve.  However, you can use the DTS option in conjunction with the Server option.  If you omit the Server option, the default local instance of the SSIS Service is assumed.  If you use the DTS option in conjunction with any of the following options,  dtexec fails:  o File  o SQL