Diagnosis
You want to attach a measure or an appropriation request to a programposition. However, this is only allowed when the program position is anend node (meaning that there are no other positions attached below itin the hieararchy).
The position currently selected is not an end node.

System Response
The assignment is not allowed.

Procedure
Use the display of the program structure to see which program positionsare end nodes. Only assign measures or appropriation requests to endnodes.