dit(bf(20)) Received SIGUSR1 or SIGINT
dit(bf(21)) Some error returned by waitpid()
dit(bf(22)) Error allocating core memory buffers
-dit(bf(23)) Partial transfer
+dit(bf(23)) Partial transfer due to error
+dit(bf(24)) Partial transfer due to vanished source files
dit(bf(30)) Timeout in data send/receive
enddit()