field mapping - 2x vs 3x different results

RDCOGIS

Hi,

I'm finally converting 2x scripts to 3x and I'm getting poor results from the same code.  Exact same code running under the two different environments, different results.

Here is the code. Simple merge of three layers into one, mapping only one field. In 3x it will not populate the field from one of the layers. Works fine in 2x. What changed or what do I need to change in the new API.

I should mention that for testing purposes, all FCs are in the same, new file geodatabase.

 

    fldFolio = arcpy.Field()
    fldFolio.name = 'Folio'
    fldFolio.aliasName = 'Folio'
    fldFolio.type = 'Text'
    fldFolio.length = 12
    fldFolio.isNullable = True

    fm = arcpy.FieldMap()
    fm.outputField = fldFolio
    fm.addInputField(PIDless_lyr, 'Folio', 0, 12)
    fm.addInputField(target_ParcelsSingle, 'BCA_Legal_Folio', 0, 12)
    fm.addInputField(target_ParcelsStrata, 'BCA_Legal_Folio', 0, 12)

    fms = arcpy.FieldMappings()
    fms.addFieldMap(fm)

    # merge everything
    print('Merge all Except MHs')
    arcpy.Merge_management([PIDless_lyr, target_ParcelsSingle, target_ParcelsStrata], target_ParcelsTmp1, fms)

 

RDCOGIS

one of the layers I'm Merging is an in-memory Feature Layer. Field Mapping did not like this. I copied the data to a physical Feature Class and all is well.

bug?....