Error starting auditd

Hello, I am currently porting auditd to a new platform. When starting it using `auditd -f`, I get the following error: "Error setting audit daemon pid (File exists)" It occurs during the call to `audit_set_pid(fd, getpid(), WAIT_YES);` in auditd.c. If I understand correctly, this call registers auditd with the kernel, is that correct? fd looks like a valid file descriptor, at least its >0. Especially the "file exists" part confuses me. In which direction can I investigate that error? Thank you and greets, Felix -- Mit freundlichen Grüßen/Best regards Felix Wolff Software Engineer [ESCRYPT-Logo_RGB] ESCRYPT GmbH Wittener Straße 45 44789 Bochum, Germany Email: felix.wolff(a)escrypt.com Phone: +49 30 403 691 957 Mobile: +49 1525 6953 720 www.escrypt.com Managing directors: Christopher White, Dr.-Ing. Thomas Wollinger Registered office and court of registry: Bochum, Germany, HRB 7877