Comment 2 for bug 362274

I had the same error on ubuntu 9.04.

uname -a
Linux ubuntu 2.6.24-24-generic #1 SMP Tue Jun 30 20:28:53 UTC 2009 i686 GNU/Linux

sudo apt-get install pimd
Reading package lists... Done
Building dependency tree
Reading state information... Done
pimd is already the newest version.
The following packages were automatically installed and are no longer required:
  libempathy11 libtelepathy-glib0 telepathy-mission-control libmissioncontrol-client0 libempathy-gtk11
  libempathy-common libmissioncontrol-server1 libtelepathy2 libempathy-gtk-common
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 64 not upgraded.
1 not fully installed or removed.
After this operation, 0B of additional disk space will be used.
Setting up pimd (2.1.0-alpha29.17-8) ...
Starting pimd: pimd: 10:05:28.152 cannot enable multicast routing in kernel: Address already in use
invoke-rc.d: initscript pimd, action "start" failed.
dpkg: error processing pimd (--configure):
 subprocess post-installation script returned error exit status 255
Errors were encountered while processing:
 pimd
E: Sub-process /usr/bin/dpkg returned an error code (1)