Hi, > how can i copy values from one array from start->end to another array? > a [tabread] [tabwrite] solution seems to be too slow. you could use vasp [vasp buf 60 2000( | [vasp.= dest 60 40] | [vasp.update] or [vasp dest 60 40( | [vasp.-> buf 60 2000] | [vasp.update] best greetings, Thomas