Hi, using ModelBuilder, how can one create two iterations loops? when you add an iteration and go to add a new one, you will see it deactivated and unable to use it again. Any idea? Thanks
the bold print A quick tour of using iterators—Help | ArcGIS for Desktop says only one iterator per model.... time to move on to python
Here's a more specific page for nesting a submodel within another model: Integrating a model within a model—Help | ArcGIS for Desktop
...although, I agree that if you're ready to make a "complex" model, it is so much easier to do in Python.
