I am using Alter Field in a Task to change a field name so I can prepare a layer to append properly.
The Alter Field fails because Error001625: https://pro.arcgis.com/en/pro-app/latest/tool-reference/tool-errors-and-warnings/001001-010000/tool-... - can't alter field nullability.
I'm not trying to alter field nullability, but I don't have the option to change that. I closed and reopened Alter Field several times and saw that below, for the first 1-2 seconds the window appears as on the left. Then the New Field is Nullable and New Field Type parameters disappear. Does anyone else have this issue?
After
Solved! Go to Solution.
The late great George Carlin would add Alter Fields to his list of oxymorons...
Software documentation
this guy writes a lot....
All, I found a workaround.
I used the Feature Class to Feature Class tool to export an intermediate file of the data. The tool has a built in Field Map, just like what you see in Append. From there I was able to alter the field name (right click & rename) and export the file, before I proceeded to Append in my Task using matching field names.