Something in Business Central not behaving? Work down this page. Most things are answered here already — and if they aren't, the last section tells you exactly what to send me so we can skip three rounds of questions. The sixty-second checks These four clear most of what reaches me. Try them before anything else. Hard refresh the page. Hold Ctrl and press F5. A normal refresh reloads the cached copy; this one doesn't. Check which company you are in. The name is at the top of the screen. Posting into the wrong entity is easier than it sounds. Open it in a private window. If it works there, the problem is cache or a browser extension, not Business Central. Try a different browser. If Edge fails and Chrome works, that alone narrows it down enormously. Part 1 — Something on screen isn't working A page won't load, a button does nothing, something has gone missing, or an error stops you posting. Start here if Business Central itself is misbehaving. A...
A user opens the Vendor Ledger Entries, sees the same Document No. and the same External Document No. posted twice, and the first reaction is: "Business Central has a bug. It allowed a duplicate posting!" I have been asked this question several times. The answer is always the same: the system did exactly what it was told to do. The journal line was posted without a Document Type . Short answer Business Central only checks for a duplicate Document No. and External Document No. when the journal line's Document Type is a transaction document such as Invoice or Credit Memo . When the Document Type is blank, the duplicate check is skipped. This is standard design, not a bug. What the user sees A purchase invoice was posted earlier. Later, someone keys in a general journal line against the same vendor, types the same Document No. and External Document No., leaves the Document Type empty, and posts. Business Central accepts it. Entry Document Type Docu...