How printing works
Three steps, and knowing which one has stalled is most of troubleshooting.
Yessort queues a job. A machine at your site fetches it. That machine sends it to a printer.
Yessort queues the job
Something asks for a print — packing a box, printing product labels, running a batch — and Yessort creates a print job.
The job carries what to print and what kind of document it is: a courier label, a packing slip, a pick list, or a label for a product, location or licence plate. See print document types.
At this point nothing has been sent anywhere. The job is waiting.
A machine at your site fetches it
Yessort does not talk to your printers directly. It cannot — they are on your network, not the internet.
Instead a small application runs on a computer at the site and collects jobs for that site. That is the print agent, and it is the piece that makes printing possible.
No agent running means no jobs collected. They queue up harmlessly and print once it is back.
The agent sends it to a printer
Which printer is not usually stated on the job. Yessort works it out — an explicit choice if one was made, otherwise your routing rules, otherwise the site's defaults.
The two reasons nothing came out
They look identical from where you are standing and need different fixes.
The agent is not running. Jobs are queued and nothing is collecting them.
No printer matched. Yessort could not work out where the job should go, so it parks the job rather than failing it — waiting for a printer it can resolve. This state is sometimes called queued-unrouted.
The second is easy to misread as a failure. It is not: nothing went wrong, and the job will print once a printer is resolvable.
Fix a print that did not appear works through both in order.
What a job goes through
Queued, then sent once an agent has it, then printing, then done. A job that the agent could not print ends in error with a reason.
See print job statuses.
Two kinds of thing get printed
Labels you design — product, location and licence-plate labels, rendered from your own templates at the moment of printing.
Documents that already exist — a courier label bought from the carrier, a packing slip, a pick list. These arrive made; printing is only delivery. See courier labels and reprints.