Just right click on the command line node, create a constant or control, and inside that type in cmd /C filename.xxx
To give you an idea, inside the constant / control, type in cmd /C dir/w and then right click on the standard output node, and create an indicator.
This will execute the dos command "dir", which will list the files in the current directory, and output them to the standard output indicator.
Note that the /w is a command line argument for dir, which just produces the list in wide format (just proof that the command line input also allows command line arguments)
By the way, if you right click on System Exec.vi, and then select Help, more often than not it will give you enough information for you to be able to do what you want to do :beer:
grmc