I was just trying to give some insight into how this thing works and why there are cases when it may not work the way one would think.
This parameter transfer thing works in such a way that if both objects (the one from which you transfer and the one you transfer to) have the a parameter with the same parameter name and parameter type, then that parameter value will be transferred.
A single window may have a parameters called sashwidth. But a double window may have two parameters called sashwidthleft and sashwidthright. So the value of the parameter sashwidth will not be transferred from the single window to the double window because there is no such parameter in that other window.
This is a hypothetical example but I hope you get what I am trying to say: it cannot be guaranteed that all parameters of all library parts will always be transferred to another library part that has different aspect to it.
If you start with a Fixed Window then try to inject its parameters into a double sash transom window, it is not guaranteed that the result will be what you expect, based on the things I wrote above.
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
AMD Ryzen9 5900X CPU, 64 GB RAM 3600 MHz, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), Windows 10 PRO ENG, Ac20-Ac27