Iteration procedure in model builder in ArcGIS9.3.1

Question

Hello. I need help regarding an iteration procedure in model builder ArcGIS9.3.1
My data are 
1. A fishnet (grid) with an id for every rectangle
2. A number of buildings with attributes like what material is used for construction and building height.

I want to select the buildings with specific construction material and a range of building height based on their location in the fishnet (the buildings should have their center in  a specific rectangle) and at the end i want to have a table of frequencies of the buildings based on those attributes saved on my pc.
I know how to do this, but i don't know how to iterate the model to automatically take separately every single rectangle (i mean every record of that table) of the fishnet and to follow the pre-mentioned procedure and make me separate tables of frequencies based on the id of every rectangle.
 
i attach a picture of my model. just FYI the layer "kannavos" means the fishnet.

I hope you understand my need.

Thanks in advance
Mike

Export Graphic.jpg

Screenshot 2026-08-04 165040.png

MikeMichaelides · Answer

Dear Curtis hello. Thanks again for your interest. I finally got it working. The problem is that i was incorporating in my model the "Iterate Field Value" (Script Tool) and not the "Iterate Field Value" (Model). When i copied the entire "Iterate Field Value" (Model) in my model and made the necessary adjustments worked like a clock. I attach a photo of my final model.

Thanks again
Mike

model_final.jpg

curtvprice · Answer

The script you found looks like an easier approach than I came up with, in fact it seems to implement the 10.x iteration in the 9.x Model Builder without having to futz with Calculate Value python code. I'm guessing the tool you found is the Iterate Field Value Model Example - Case Study  in the Geoprocessing Model and Script Tool Gallery.

This tool is really well documented. I suggest following its help - this is a better solution than I posted. As for your error message, I'm guessing "%n%" is not a valid argument, since it is a reserved read-only variable that evaluates to a number.

MikeMichaelides · Answer

Dear Curtis thanks for your reply. First can you be a little more specific, like with the steps to follow?
The "Calculate Value" needs a python expression in which I'm not familiar.
Also i found this script tool "iterate field value", but when i incorporate it in my model it keeps popping an error 000358.
I attach a picture of the incorporation in case it may help you.
Thank you again for your interest
Mike

model.jpg