Function ROUTING_MAINTAIN Field ZAEHL

[#1]

Hello!

I'm trying to duplicate a position of a routing group in a custom program.
My requirement is to use the ROUTING_MAINTAIN function while modifying the ZAEHL field, inserting the next sequential number after the last one present in the PLPO table.

What is the correct way to do this? It seems that even when passing the highest sequential number, the value is always forced to 1.

Thanks in advance

Giulian