Hi, I am iterating through a feature dataset with four feature classes to provide the input for the summarize within tool. For some reason the tool fails every time on the first iteration (error 999999), while the other three iterations are fine and lead tothe output I expect. I was wondering what the reason for this could be?
I'm using ArcGIS Pro version 2.7.0
Attached are screenshots of the model and an example of input polygon and summary features
I was having a similar issue with an Iterator from a model I imported from ArcMap into ArcPro. Removing the input to the iterator and adding it back again in Pro seemed to fix the issue. Any chance your model originated in ArcMap?