Start-Process Arguments not getting added?

I’m sure that I’m overlooking something stupid simple, but I can’t for the life of me figure out why this isn’t working:

$path = ".installfilessetup.exe"; $path_args = "-inputFile installer_input.txt"; Start-Process $path -ArgumentList $path_args; 

Running install.ps1 with the above in it starts setup.exe, but does not pass -inputFile installer_input.txt to it.

Running this from the same location (well, one folder deeper – inside the ‘installfiles’ folder) via command prompt works just fine:

setup.exe -inputFile installer_input.txt 

What am I overlooking here?

Thanks!!