Hi Franz / Jonathan, thank you for your quick response.
First I have tried your solution, but it was a bit too complicated for me, because "Item Template" is just a temporary table, more a visual representation of the table "Config. Template Line".
But your answer did point me in another direction, just show in a subpage the additional Item fields.
In the OnAfterInsert event of the "Config. Template Header" i add the additional fields to the table "Config. Template Line" and in the subpage you can only modify this fields.
This works in this case, for the rest I will wait till "Item Template" will work with 30 array elements instead of the 17 right now.
Again thank you for your answer.
Kind regard Adalbert
