Tips & Tricks for your 4D Apps – April 2025 Edition

by Add Komoncharoensiri, Director of Technical Services at 4D Inc

Here we go with another set of tips and tricks.

The 4D Knowledge Base is a library of information about 4D technology where weekly tech tips and monthly tech notes are actively published. If you missed the last tips on the KB, that’s fine; here is a compilation from the past few weeks.

This blog post covers 15 tips:

1. 1. 1. Blank username and password when sending a request with HTTP Request command
      2.  Dealing with fragmented TCP Data
      3. Publishing a Method as a Web Service in 4D
      4. Error 600: File {data_file} not found
      5. Cannot delete “settings.4DSettings” Syntax Error
      6. Gmail SMTP in 4D: Understanding the “From” Address Behavior
      7.  Storing Custom Properties in 4D Write Pro Objects
      8. “Method is currently being edited…” Error after renaming & recreating
      9. ProcDump: Crash vs Hung
      10. Breakpoints and TRACE ignored in headless mode
      11. Troubleshooting Local Network Authorization in macOS
      12.  Utilizing Method Editor Item Look Ups
      13. How to Organize Tables in 4D Structure
      14. Specifying Form Events
      15. Avoid REST API Session Flooding