@cosmowave OK，now I get it. Thank you!

or just the printer is working?such as it is printing a model?

load.g

Here is the file

Recently I've been trying the ERCFonRRF project and and had some problems with it.
In the load.g file,I see this command of command

if state.status == "processing”

but I don't know what this mean, I searched the meta command ,but didn't found it. So I come here ask for help
where can I get the information about "state.status" and "processing"

The complete code is as follow: