https://forge.codesys.com/forge/talk/Engineering/thread/9f0d7f06ea/2025-12-01T14:27:54.096000ZRecent posts to Source code changes since last download 2025-12-01T14:27:54.096000Z2025-12-01T14:27:54.096000Zdurallymaxhttps://forge.codesys.com/u/durallymax/https://forge.codesys.com2b22a4c81eee7bedd2ad2995db688e89fad4d1f0

<div class="markdown_content"><p>What do the details show? Is it requesting an online change or download? If the compile file is missing, it will request a download. Several things can trigger an online change, if you haven't changed the code, likely libraries. The details should provide some guidance.</p></div>

2025-11-28T09:43:56.095000Z2025-11-28T09:43:56.095000Zscrisphttps://forge.codesys.com/u/scrisp/https://forge.codesys.com0ad72120cc83f9d18e8064cb1eba66718bd35c61

<div class="markdown_content"><p>Why does CODESYS 3.5 show the message “Source code changes since last download” even though I did not create or modify any new variables? When I go online with the PLC, it detects changes and suggests synchronizing, but nothing was actually changed in the project. What could cause this and how can I fix it? </p></div>