Dear Giovanni,

Like other European SWMMers, I think you may experience some troubles with international settings. SWMM5 now is a Full Win32 application. For this reason you should look at *.inp example files (using a text editor) and set up your "International Settings" (in Control Panel) in order to fit SWMM requirements.

Regards,

Gabriele Freni
freni@idra.unipa.it