This is a list of rsync exit codes (rsync status codes / rsync error codes).
0 Success 1 Syntax or usage error 2 Protocol incompatibility 3 Errors selecting input/output files, dirs 4 Requested action not supported: an attempt was made to manipulate 64-bit files on a platform that cannot support them; or an option was specified that is supported by the client and not by the server. 5 Error starting client-server protocol 6 Daemon unable to append to log-file 10 Error in socket I/O 11 Error in file I/O 12 Error in rsync protocol data stream 13 Errors with program diagnostics 14 Error in IPC code 20 Received SIGUSR1 or SIGINT 21 Some error returned by waitpid() 22 Error allocating core memory buffers 23 Partial transfer due to error 24 Partial transfer due to vanished source files 25 The --max-delete limit stopped deletions 30 Timeout in data send/receive 35 Timeout waiting for daemon connection
Error code 11 can be confusing when rsync is started as a service on a Windows platform. It can mean that the pid file for rsync already exists in the C:\Program Files\cwRsyncServer folder (or ony other directory where rsync is installed) - although no other info will be given in Windows Event Log. It will become more apparent only if rsync is started as a service from the command line.