Hey Streetwind, thanks for the response. That was my assumption too.
After you asked this, i went back in game to repeat what I had done to get the error message which was occuring. And it didn't. It worked. I don't know if maybe me closing+reopening the software in this time did something to help it work, or if it was completely a PICNIC error (aka, myself) but i had just been copy and pasting the command and value in so that shouldn't have been the case. Maybe I had a sneaky extra space somewhere which was causing the issue, either way. It turns out there wasn't an issue?
So thanks for taking the time to respond, but yeah, seems it sorted itself out!