vbSEO doesn't like Aircraft

One of my users posted a thead with the title "Canberra PR.9..............."
This was translated to "1748-canberra-page-ranking-9-a.html"

And this was leading to the error

Warning: main(/home/httpd/vhosts/simmerspaintshop.com/httpdocs/forums/1748-canberra-index.php) [function.main]: failed to open stream: No such file or directory in /home/httpd/vhosts/simmerspaintshop.com/httpdocs/forums/vbseo.php on line 1129

Fatal error: main() [function.require]: Failed opening required '/home/httpd/vhosts/simmerspaintshop.com/httpdocs/forums/1748-canberra-index.php' (include_path='.:/usr/local/psa/apache/share/pear') in /home/httpd/vhosts/simmerspaintshop.com/httpdocs/forums/vbseo.php on line 1129

Changing the topic title to "Canberra PR9" (removing the dot between the PR and 9) was the action that seems to solve the problem.
Since designations like PR.9, or at least PR.<someting> are used more often this problem might occur again in the future.
So I hope you can fix it or hand me a workaround for it.

And telling the users not to use it is no option since I know little people who really read forumrules or FAQ's

looks like its acronym expansion causing this.

go into the vbseocp.php page.

you'll find the software comes with 2 rules default.

seo-> search engine optimization
pr -> page rank

remove those rules and you should be good.

It might be also a Custom Rewrite Rule conflict. Do you have any CRRs defined?

Thanks, I'll look into this.
I do have a few CRRs but they are for Downloads II, CMPS, vBa Links and are quite basic as you can find them on the forum. Never the less I'll check them tonight.

Please post your CRRs here so that we can find the conflicting one.

The Acronym Expansion mentioned above was the cause.
Removing the line pr -> page rank did the trick.

I did a test post before removing it and could reproduce the problem. After removing the line it worked fine like all others.

Thanks for the help