In my case, using WinSCP 5.17.10. WinSCP is monitoring a local Windows 10 NTFS path, synchronized with a remote Linux ext3 path over SSH.
Plenty of free RAM, free CPU, and using a Samsung EVO SSD storage (pretty fast).
The Keeping remote directory up to date... settings:
☑ Update subdirectories
☑ Continue on error
☑ Existing files only
with custom Transfer Settings that ignore dirs .git, .pytest_cache, and files *.pyc.
Only sometimes does WinSCP upload a local Windows modified file.
Sometimes when I save the file C:\project\path\file1 with inserted or removed contents, the dialog Keeping remote directory up to date... bottom-half log window reads:
15:00:00 Change in 'C:\project\path' detected 15:00:01 Watching for changes in 411 directories... 15:00:02 Change in 'C:\project' detected 15:00:03 Watching for changes in 413 directories... 15:00:04 Change in 'C:\project' detected
It fails to upload the file C:\project\path\file1. And the log messages really are 1 second apart.
But sometimes it does correctly upload the file. That log looks like:
15:00:00 Change in 'C:\project\path' detected 15:00:01 File 'C:\project\pathfile1' uploaded 15:00:02 Change in 'C:\project' detected 15:00:03 Watching for changes in 413 directories...
The pattern is the path changes detected, as reported by the Change ... detected log messages, are inconsistent.
In my real world case, the file is at path depth
C:\Users\user1\path3\path4\path5\path6\path7\foobar.py . WinSCP is watching at local path C:\Users\user1\path3\path4 .