Try to remove mailman package via CLI and install it back with rpm utility but not via CP.
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[root@server root]# rpm -e mailman
error: Failed dependencies:
mailman >= 2.1 is needed by (installed) psa-mailman-configurator-10.9.0-cos5.build109101029.18.x86_64
[root@server root]# rpm -e
rpm: no packages given for erase
[root@server root]# rpm -e psa-mailman-configurator
[root@server root]# rpm -e mailman
warning: /usr/lib/mailman/Mailman/mm_cfg.py saved as /usr/lib/mailman/Mailman/mm_cfg.py.rpmsave
warning: /etc/cron.d/mailman saved as /etc/cron.d/mailman.rpmsave
[root@server root]#
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And then...
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[root@server root]# yum install mailman
[...]
Running Transaction
Installing : mailman 1/1
Installed:
mailman.x86_64 3:2.1.9-4.el5
Complete!
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However, same error:
Unable to create list: listmng failed: listmng: Error: cannot create new list: is Mailman configured properly?. System error 2: No such file or directory
I found this at mailman error log:
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Nov 30 05:26:25 2010 mailmanctl(17294): PID unreadable in: /var/run/mailman/mas...
Nov 30 05:26:25 2010 mailmanctl(17294): [Errno 2] No such file or directory: '/...
Nov 30 05:26:25 2010 mailmanctl(17294): Is qrunner even running?
Nov 30 18:44:59 2010 mailmanctl(12560): PID unreadable in: /var/run/mailman/mas...
Nov 30 18:44:59 2010 mailmanctl(12560): [Errno 2] No such file or directory: '/...
Nov 30 18:44:59 2010 mailmanctl(12560): Is qrunner even running?
Nov 30 18:46:27 2010 mailmanctl(12669): PID unreadable in: /var/run/mailman/mas...
Nov 30 18:46:27 2010 mailmanctl(12669): [Errno 2] No such file or directory: '/...
Nov 30 18:46:27 2010 mailmanctl(12669): Is qrunner even running?
Nov 30 20:27:26 2010 mailmanctl(14275): The master qrunner lock could not be ac...
master qrunner is already running.
Nov 30 20:27:26 2010 mailmanctl(14275):
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Nothing more than that.