Dear Friends, I have almost similar kind of program typedef std::vector<int> vec_name; struct network { boost::variant net_id; }; typedef std::vector<network>network_list; in main when I am extracting content of network_list vector in the following manner // create the instance for vector network_list net_list; for(int i=0; i >’ to ‘unsigned char*’ in assignment Best Regards BaBu -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.