I have installed OpenMPI 1.6.5 under cygwin. When trying test example $mpirun hello
or, e.g., more complex examples from scalapack, such as $mpirun -np 4 xslu everything works fine when there is an internet connection. However, when the cable is disconnected, mpirun hangs without any error message. With -d option the output stops before the line [my_computer...] [[3169,1],0] node[0].name my_computer... daemon0 which is included in the output when the internet is on. The firewall is turned off. I tried also to add options: -host localhost, -mca btl self, --mca btl_tcp_if_include “127.0.0.1/8” and their combinations, but nothing has changed. Thank you in advance for advice. Klara Hornisova
