running .bat file with .exe files compiled with different compilers

Hello,

I have a batch file (.bat) that calls different .exe files. It used to run perfectly until I downloaded a newer compiler version to compile a new .exe file. It gives me an error that the version 9 dll is not found, but I do have it installed on the computer (as well as version 8, the version with which the other files are compiled).

I am not sure what is going on, I know that 2 versions can run in parallel, so I am not sure why it's happening.

Also, is it possible to run an older version of compiler in a newer version of matlab?

Thank you

Francois