CCleaner64.exe /clean log.txt not working (technician version)

command line returns but neither do I see an icon on my system task bar, nor a log.txt is created,

any suggestions?

Technician version? I've never seen that command in ccleaner's cmdline repertoire.

https://www.piriform.com/docs/ccleaner/advanced-usage/command-line-parameters

Never mind my link shows what you mean. You should probably ask your priority support rep

https://piriform.zendesk.com/hc/en-us/requests/new

This is a user forum and most of us don't and haven't used those switches