Single post in A Somewhat Extensive Guide to BBCodes

So, I've been trying to make a progress bar that counts eclipse flutes, but it isn't working. Here's the code I'm trying to work with: [progress="[inventory=Eclipse Flute-300]/300"][item=Eclipse Flute] × [inventory=Eclipse Flute-300] / 300[/progress] I'm not sure what I'm doing wrong, but it gives me an error when I try to input it in my signature. My goal is 300 Eclipse flutes, and I currently only have one. Thanks in advance!