Ventana software support forum

I am building a model and i notice after a while some arrows become invisible and when I try creating new arrows between the variables it gives me a message "this connection exists.do you want to remove the old arrow?"Please hw can I stop these arrows from being invisible?

Can you post the model that is causing the problems?

Are the missing arrows from Initial Variables, such as the starting value of a Level? If so, the default option in Vensim is to hide these. To change the default, go to Model>Settings>Sketch and check the first option.

done exactly thay and the arrows are back in grey,thanks....is there any reason these are hidden or are they ideally meant to be hidden?

They are hidden by default because they don't affect the dynamic structure of the model. I actually prefer things the other way, so I generally use the Model>Settings to turn them on, then manually hide any arrows that cause visual clutter. Then you can show/hide them as needed by hitting the H key (or menu).

many thanks