Hi Michel I still fail to understand what problem are you trying to solve here ....: Either the application in question can be ported to 64 bit (so no problem ..) or not: then why to run it on an 64 bit system in first place ? SL exists in both 32 and 64 bit variants ... Cheers Jarek __ ------------------------------------------------------- _ Jaroslaw_Polok ___________________ CERN - IT/FIO/LA _ _ http://home.cern.ch/~jpolok ___ tel_+41_22_767_1834 _ _____________________________________ +41_78_792_0795 _