Thank you for your suggestion. However, it appears that the variable LAYLOCKFADECTL is not the only one controlling this effect, setting a negative value just turns off the fade effect for locked layers while keeping the value. If you look at the way the LAYULK works you will see that when you execute it, it unlocks the selected layers but the variable is not modified and the effect still on. This is more evident if you have more than one layer locked. It seems to me that somehow there must be a setting for controlling this effect per layer. Perhaps it is done through a dictionary, an xrecord or something. I just have not been lucky to find it.
