I have a 1 GB RAM windows xp Pro system with at least 80% busy RAM, while on the hard disk I have at least 30 GB free...I'll try to free some memory and to apply delta on a linux box with deltarpm, thanks, Simone >Simon how much ram and how much free space on the windoz box? If you are >trying to create a 4+Gb DVD iso you will need at least 2 times as much hard >drive space for temporary files on a windoz box. I have seen similar problems >when trying to add files to very large zip back ups when I used to be a >regular windoz user.