One of the main errors seems to be that I try "call fire 0" and it is saying that I can 'only fire record_length to empty slots' even though I have ensured I am on a playing slot. There are two possible parameters here: one is record length for a blank clip slot and one is for launch quantization for a filled slot. It thinks I am trying to do the first parameter but I am trying to pass an argument to the second parameter. How can I specificy this second parameter?

Generally parameters of call messages are plain numbers. In this case, the first is length in beats and the second is an index of the global quantization menu I think. Just try different values.

Thanks for your reply Broc, I was ultimately able to figure out a few things. The fire function seems to require both parameters to work. You were exactly right that they were simply integers. Also I was mistaken about the exact functionality of fire in this context, it seems to only be used to start recording in an empty clip slot. It does not seem to take an existing clip and override the global or (I was hoping) the clip launch quantization.