Thank you xav

<Why don't you add a field to the the table wich conserves the original order by numbering the points according to the original sequence. Then it would be possible to sort the Table again with this key and get the original order back.>

Yes, this could be a good solution.

Also I already have the necessary routines for restoring the original data.

They are used in the other application (GE-Graph), where you can filter data according to max and min values that you input. There is a button (Remove) that restores the original data.

I will think in both methods to see which one could be more efficiently implemented in GE-Path.

I will try to work in this weekend.