Using iterations in modelbuilder

[PeterThomsen]

Hi guys

I couldn't really figure out in which forum to ask this, so I'll try here.
Basically I need to run a model from modelbuilder 20 times where the final output of each run is used as the starting input in the next run. I've should either use the while or for iteration I guess, but I can't really figure out how to implement them in the model.

[PeterThomsen]

That feedback function was just what I needed. The only thing I had to change in my original model was to add the feedback line. The model ended up looking like this:

[ATTACH=CONFIG]16994[/ATTACH]

I now get a map for each year, and the original input file uses the previous output as feedback, just as I wanted. Thanks a lot 🙂