See https://winscp.net/eng/docs/ui_pref_logging

I was not able to replicate the error, it works quite well and seems even faster than before with 5.17.8 build 10803 so whatever was it did not repeated. This synchronize function is quite precious, I wonder if most users are aware.

BTW sorry to ask: how would one get session log files?

Please post session log files from both versions.

Hi. Today I updated at a Windows 7 system from 5.17.7 to 5.17.8 and notice de Synchronize function ( menu Commands / Synchronize ) used to copy changed files or new by date from remote to local, with local delete for files not found at remote, does not work any more: it hangs up at remote directory reading. Back to 5.17.7 it works fine as usual.