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ERROR 000278: Field mapping error: merge rule not valid for output field OBJECTID

Question asked by GISJim121 on Jun 24, 2020

Hi folks,

I have a Python script that is looping through all the fields in our parcel layer and adding them to a field map object.  Afterwards, I am adding the field map object to the field mappings.  I recently learned that you cannot add the "Shape" field so I had to write a conditional for that.  However, I am running into another problem.  It seems like the field OBJECTID cannot be merged.  Not sure why.  I have tried removing it without success.  I also tried removing it and recreating it without any success.  Anyone else experience this issue?

 

Python 2.7.16

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