How could I test if the Flux server is working normally?

In order to test the Flux server you have to follow the next steps:

1Open a Window Explorer in the directory C:\Altair\Flux_12.1\Api\win32\C (for standard installation)

Double click on flux_mp32.bat

It should open a DOS window, in which Flux will be launched, a project is opened, solved and closed automatically. You can check what has been done by looking at Flux3D.log and files.