CAD tip # 7779:

LAYEREVAL controls when the Unreconciled New Layer filter list in the Layer Properties Manager is evaluated for new layers.

LAYEREVALCTL controls the overall unreconciled new layer filter list in the Layer Properties Manager which is evaluated for new layers. This system variable also affects whether the new layer notification is displayed or not.

Note: LAYEREVALCTL overrides the LAYEREVAL and LAYERNOTIFY setvars when LAYEREVALCTL=0. It acts like a global off (but not a global on). There is no effect even if LAYEREVALCTL is turned on if LAYERNOTIFY=0 or LAYEREVAL=0. LAYEREVALCTL must be set to 1 for LAYERNOTIFY and LAYEREVAL to function correctly.