missing arrows

[thrillz84]

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?

[Administrator]

Can you post the model that is causing the problems?

[Wilson]

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.

[thrillz84]

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?

[tomfid]

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).

[thrillz84]

many thanks