Thanks for all of you! I finally get it work now. The solution is to disable the firewall on the fc5 machine. It just blocks the mpi communication. Michael Edwards <miedward at gmail.com> wrote: So you have the two computers connected with a cross-over ethernet cable? If you used a regular cable, strange things could happen, though I would expect nothing to work in that case... Are both machines set up with a static IP or is one of the machines acting as a DNS server? Are both machines allowing incoming traffic on that port (ie, not blocked by firewall)? Check /etc/hosts and make sure both machines know about the other? There are lots and lots of reasons you would get a "no route to host" message, these are just some offhand thoughts. On 9/17/06, ying xu wrote: > Hello: > I installed mpich2 on a ubuntu 6.06 machine, then share the install > directory with a FC5 machine by using NFS. These two machines were connected > to each other directly by a cable. The ubuntu machine is connected to a > router which connects to internet. > > My problem is that "when I 'mpdcheck -s' on ubuntu machine, "mpdcheck -c > ubuntu-machine port " on FC5 succeed. But I can't do it reversely. I mean > "when I 'mpdcheck -s' on FC5 machine, "mpdcheck -c fc5 port" failed with the > following error: > -------------------------------------------------------------------------------------------- > Traceback (most recent call last): > File "/home/xuying/mpich2-install/bin/mpdcheck", line > 103, in ? > sock.connect((argv[argidx+1],int(argv[argidx+2]))) # note > double parens > File "", line 1, in connect > socket.error: (113, 'No route to host') > -------------------------------------------------------------------------------------------- > > please help! > > --------------------------------------------------------------------------------------------- > > > > > > ________________________________ > All-new Yahoo! Mail - Fire up a more powerful email and get things done > faster. > > > _______________________________________________ > Bioclusters maillist - Bioclusters at bioinformatics.org > https://bioinformatics.org/mailman/listinfo/bioclusters > > > _______________________________________________ Bioclusters maillist - Bioclusters at bioinformatics.org https://bioinformatics.org/mailman/listinfo/bioclusters --------------------------------- Get your email and more, right on the new Yahoo.com -------------- next part -------------- An HTML attachment was scrubbed... URL: http://bioinformatics.org/pipermail/bioclusters/attachments/20060918/8d05165a/attachment-0001.html