Hi, I've commited modifs in processqueue in rel_2_0 branch. I've hardcoded the db handler call everywhere. Let me know if it works better. Another idea : did you modify your /etc/my.cnf (mySQL config file) ? ine has been. I copy it to you : [mysqld] set-variable = key_buffer=32M set-variable = max_allowed_packet=1M set-variable = table_cache=256 set-variable = sort_buffer=4M set-variable = record_buffer=1M set-variable = myisam_sort_buffer_size=16M set-variable = thread_cache=8 Note : i did >10 tests with 2 servers open. I only had a problem once, without /etc/my.cnf modified (= I removed it, & restarted mySQL) -- Paul POULAIN Consultant indépendant en logiciels libres responsable francophone de koha (SIGB libre http://www.koha-fr.org)