CreateEvent: event 'door_moving' not registered.

Hi everyone, heres my problem.

I have made a normal door that slides from left to right once the button has been pressed, it works fine but everything the door opens or closes the error message:

CreateEvent: event 'door_moving' not registered.

comes up, anyone know what this is and how to get rid of/fix it?

I get that all the time. I think it's pretty harmless - less of an error and more like "whining" of some sort.

Know how to fix it or what it meens?

Anyone, come on someone must know, its really anoying me, will it show when I play the map normally?

how did you set this up? give us all the information on how the door input and output's are set up.

It happens with every door I make, the error message comes up everytime. At the moment the doors are under control of a button, the outputs are fine and work, its just the damn message.