The SDESSNODBQUALIFIER environment variable causes the script to fail with IDLE in ArcGIS Pro, returning the error, "RuntimeError: Attribute column not found [42S22 : [Microsoft] [ODBC Driver 17 for SQL Server] [SQL Server] Invalid column name 'MyColumnA'.] [DBO.Polylines]". The script runs successfully with SDESSNODBQUALIFIER if IDLE in ArcGIS Desktop is used, feature classes have different names, or if the data source is a file geodatabase.