Hi, What version of Perl do you guys use. I get a problem with z3950 and I'm using Perl 5.8.x (x=1 I think) on a Fedora Core 1 system. A system such as Red Hat 7.3 uses (by default I think) perl 5.6.1. The man page for "perlfork" with 5.8 says "...fork() emulation has considerably matured...", while on 5.6.1 it says "...continues to be an experimental feature...". I think the problem (or part of it) is because of the fork() call. There's an email from myself 2 days ago and one from tomasz on Feb 17th that describes this. Maybe that information can help. Maybe Ben can look if he gets any errors in /usr/local/koha/log/z3950...log that mention lossing a connection to MySQL? Deric