Dear Mat, Dears thanks for answers
The file selection dialog sorts alphabetically.
There is no quick-n-easy way to resort the data groups once in Athena. The best solution would be to name the files in a way that alphabetical sorting will be the same as time sorting. The way to do that will be to name the first file "f01.fio" rather than "r1.fio".
I agree, I do that way or using Alt+[J,K] combination but it is time consuming you can imagine how much work you need to do when you have more than 100 files... ;) there is another way - importing in parts - 1 to 9, 10 - 99, 100 - 999, ... if I can suggest, whould be useful the posibility of move marked groups in Athena, like copy and paste...
another problem which apears, is the limitation of the memmory...
That is a well known, well discussed problem. Ifeffit is written in fortran. Fortran does not have dynamic memory allocation. The only practical solution is tonot read so many data files in at a time.
yap, I know this, so I didn't ask about it, but mentioned only ;) greetings kicaj