Dear community,
Sorry it was my mistake, I had a redundant "|more" in my build script.
So now it works fine, here how it looks like:
set NASMENV= -Xvc -w+orphan-labels
nasm -f bin boot.asm -o bin/boot.bin -l bin/boot.lst
if errorlevel 1 goto quit
... (cont.)
Best, Reuven