Hi, seems that this is not a Copy Constructor. file snmp_pp_ext.h from 160 to 165: /** * Copy constructor. * * @param oid - Another object identifier. */ Oidx(const Oid& oid); Regards, Karl -- Dipl.-Ing. Karl Abicht Eichenweg 11 25582 Hohenaspe mailto: karl at abicht.net phone: +49 4893 373115 mobile: +49 172 4566432 site: http://www.abicht.net