Where Does printf Output Go When Running an SCTP Server in NS-3 DCE?

[なえ]

I edited and am running sctp-server, sctp-client, and dce-sctp-simple.
Inside dce-sctp-simple, there is the following code:

process.SetBinary ("sctp-server");
process.ResetArguments ();
process.SetStackSize (1<<16);
apps = process.Install (nodes.Get (0));
apps.Start (Seconds (1.0));

When this program runs, where does the printf output written inside sctp-server appear?
I cannot find where the server’s console output is logged.