Verify SSAS Backup returning arguments instead of expected output
That's what happens when you pass in a backup file that either doesn't exist or on which you don't have access.

For example if I run the command on an existing backup file I get this:

msmdsrv -j -b "c:\temp\AdventureWorksDW2012Multidimensional-EE.abf"


Outputs the arguments as well as the test results:


  -j -b c:\temp\AdventureWorksDW2012Multidimensional-EE.abf
  
  Backup file \?\c:\temp\AdventureWorksDW2012Multidimensional-EE.abf
  contains database with the Name of
  AdventureWorksDW2012Multidimensional-EE and Id of 
  AdventureWorksDW2012Multidimensional-EE consisting of 7927 files with the
  total size of 5554858464 bytes 
  All files were successfully tested


You can see the output starts with the arguments and then shows the test results.

If you point msmdsrv.exe to a non existing backup file it just returns the arguments and no results (unfortunately no error message either)

msmdsrv -j -b "c:\temp\NOTEXISTING.abf"


simply returns


  -j -b c:\temp\NOTEXISTING.abf