Hi Marco.
Not sure if I understand what you mean by “it works when the whole program doesn’t use layers”.
Layers shouldn’t be a problem.
When you export your program as HSSE layer, is the macro page attached to the program you are exporting?
You can create a macro page for program, layer or a script module. In order to work in Halion Sonic SE it needs to be attached to the element you are exporting.