Many thanks sbillard; setup runs without any alerts now after adding the line to php.ini. If I might risk another query, going to admin -> 'check updates', I see the following fault msg:- Fatal error: Call to undefined function sprinf() in C:\Program Files\Abyss Web Server\htdocs\zenphoto\zp-core\admin.php on line 1092
Are you able to give me information on this, please? thanks again - brilliant application - jeffjohn