ADD / CALCULATE / ITERATE and EXPORT at Model Builder

Hi everbody.

Here I am again, asking for help :confused:

I'm trying to build a model at model builder and I don't know if it's possible.

I want to do the following steps:

Intersect two layers >>> Add a field in the resulting layer >>> calculate a expression in the just created field >>> select some register of the expression calculated, and finally >>> export the selected registers to a new layer.

Here's image of what I was trying. The problem is probably occuring after the ADD FIELD step, cause I can't set the just created field as a input in the CALCULATE FIELD step.

I aprecciate any help. Thank's

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