I have a Python script that field maps a handful of polygon layers and then merges them. I run this script a couple of times a year. Recently I went to run it and am getting an error message about a field not being found. I didn't recall changing the script, so after adding some debugging code but not getting anywhere I started thinking that something had changed with the input data. I confirmed it had not and then yesterday the light went on that it might be due to upgrading Pro. Last time I ran it in April it was under 3.1 but recently I upgraded to 3.3. I just reverted back to 3.1 and now it's working again.
I can provide the code and the data but before I do that, I'm wondering if there have been any changes to the way the FieldMap() and Merge() tools work that could be causing this.
(We won't be upgrading to 3.5 until we upgrade ArcGIS Enterprise to 11.5 in early November.)
