Hi Kristian, On 4/17/2020 4:26 AM, Kristian Ivarsson via Cygwin wrote: > If you're creating a lot's of named pipes in main process and in children > and then using unlink, some of the named pipe files are not removed from the > file system and no error is issued, i.e. unlink doesn't return -1 Thanks for the report. As usual, a test case would be helpful. Ken