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Error glossary
Goal
Find the plain-language meaning of a Lyt-ning message, the first action to try, and when to escalate to Support.
Where this happens
All error codes apply across the Core App (back office) and the POS tills (Retail POS App, Restaurant POS App). Where the wording or the recovery path differs between surfaces, the code's ## What to do block names the surface you are on.
These messages use plain language. Follow the action first; raise a ticket if the message returns.
C-1 — Cannot sign in
What to do: Check the store and sign-in name. Use the approved reset option or ask your supervisor. Never share a password in a ticket.
C-2 — You do not have permission
What to do: Ask your supervisor to confirm the required permission. Do not use another person's account.
C-3 — Required details are missing
What to do: Read the field label, enter the requested value, and try again.
C-4 — The item or customer was not found
What to do: Check spelling, barcode, code, or store. Ask an authorised user to create or correct the record if it is genuinely missing.
C-5 — This record already exists
What to do: Search first and open the existing record. Do not create a duplicate.
C-6 — The quantity or price is not valid
What to do: Enter the actual quantity or a valid price, then check the unit before saving.
C-7 — The action could not be saved
What to do: Wait, search for the record, and retry only if it was not saved. Contact Support if it repeats.
C-8 — Payment needs attention
What to do: Do not take payment again until you check the original reference and ask your supervisor.
C-9 — Stock update needs attention
What to do: Check the item and reference, recount if needed, and ask a supervisor before repeating it.
C-10 — Integration or sync is pending
What to do: Keep the original reference, wait for the normal retry period, and contact Support if it remains pending or fails.
C-11 — You are offline or the connection keeps dropping
What to do: Stay on the app — do not force-close or clear app data. The till keeps saving sales on the device and uploads them when the link returns. Pause cloud-only actions like integrations and some admin screens. See Working offline for the full recovery steps.
What to include when escalating
Give Support the store name, screen, reference number, exact message, what you were trying to do, and what you already tried. Do not include passwords, full payment details, or unnecessary customer information.