The message means that the system cannot find
dsget.exe
in the current directory, or in a folder that is on the default PATH environment variable. Start by running a command prompt (WIN+R, "cmd", ENTER) and change directory to the batch file folder:
C:[ENTER]
CD \batdir[ENTER]
dir dsget.*[ENTER]
And see what it finds. At a guess, nothing.
They try
PATH[ENTER]
And see what folders Windows is looking at.
The easiest way around this is problem to take the full path to your exe and use that in your batch file instead of just "dsget": "C:\MyApps\TheyLiveInHere\dsget.exe"