how do you make a Blank cue that does not affect the values of the previous cue So I can trigger an AV effect in cue list 2?

Question

The trigger part is easy via the ext link field and works. However I have the need to have cue list 2 triggered not only in some cue list 1 cues but also separately to any lighting changes in list 1 
 So I need a way to 'hold' the ext link data in a cue in list 1 but without having any other channel dat present In that cue or I will end up having to duplicate the LX cues which is ridiculous 
 Tried releasing all channels but then I lose al the output ...... Tried using make null also but this is unreliable as it seems to work once and then I lose all he out out again 
 This must a be a standard requirement surely ? The second cue list is driving a video subsystem via dmx 
 Any ideas ? 
 Thanks 
 Nick

EugeGio · Answer

Hi Nick, 
This possibly might work. 
In your second cue list, active channel display, plot a dummy channel lets say ch3000 to 1% for all of your cues with an external link firing your av as per needed. 
 
Using the fader config window - apply a channel filter filtering down to just ch3000 to that cue list. 
 
Just a thought!