To expand upon what Tyler here said (I am one of his buddies here in Survival: The Lost Era): It is possible to create a fire. However, upon making it, the materials required are consumed (one Stone and two Lumber.)

Now, this isn't to say that the command itself is broken. It works, and consumes the materials as I previously stated, but the fire appears for a moment (or, it did at first.) and disappears. Now it just does not appear at all. Due to this, i cannot work with Iron, which means I can not make any weapons out of it. I'm sure there are other problems, but this is the only one I can come up with at the moment.