Running tonastran error - student edition

Hi,

I'm trying to run the tonastran command

>> abaqus -tonastran -job job_name

 and I get this error message:

>> "Abaqus Error: Command line option "tonastran" may not be used with "analysis" "

It looks like the command is not installed? I have the student 2016 edition.
Is there another way of converting between this files? 

 

Thanks!