Nothing arrived. What now
Silence and refusal look identical on screen and need opposite responses. Telling them apart takes one look.
Blog
Troubleshooting
How the lines behave, why codes go astray, and what the catalogue figures are actually saying. Written by the people who keep the rail running.
Why a platform turns a line away
A refusal happens before any message is sent, and it is decided by three things you can actually check beforehand.