File drivers and output elements do not work with UDP sockets
Seems like the handling of the "create" option for file drivers and output element is incorrect when UDP sockets are employed.
File drivers should wait for incoming connections (i.e. the corresponding sockets should be created by MBDyn, to act as servers), while output elements should connect to an external solver, acting as clients, so the corresponding sockets should not be created by MBDyn.
I make a quick fix in the fix_udp_stream
branch, which seems to work.