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Tech Tip: Failed to Synchronize Folders errors
PRODUCT: 4D | VERSION: 20 | PLATFORM: Mac & Win
Published On: April 21, 2025

A common error in built 4D Client applications is the following:

-10517 Failed to synchronize {folder} folder.

This error is usually caused by the presence of specific files, file extensions, or symbols in file names. If a folder is specified in {folder} it will likely contain the file causing the issue.

Here are some tips that might solve this error:
  • Delete cache folders.
  • Check for any special characters, symbols or spaces in the folder and file names.
  • If existent, delete the .DS_Store file in the Plugins folder.
  • If existent, delete the file Icon*.