Couldnt Load GENMIDI.wopl

[theGiga-T]

file is there
I run the program via command prompt as instructed
program_path midi_path
I get the error above
why?

Also I can use custom wopl files right? (No I didnt replace it, I wanna test it as it is first)

[theGiga-T]

I had to include it in the command, even if it looks like it's optional
Also I had to switch my OS language to English, it didn't work at all otherwise