I am trying to publish an ArcGIS geoprocessing service in 10.2 I have a script setup that will run multiple times through Pycharm, but when I run it in ArcGIS it will run once and return this error:

Traceback (most recent call last): File "C:\Users\Desktop\git\GeoprocessingService.py", line 477, in main() File "C:\Users\Desktop\git\GeoprocessingService.py", line 372, in main cur) File "C:\Users\Desktop/git\GeoprocessingService.py", line 136, in value_query results = cur.fetchall() File "C:\Python27\ArcGIS10.2\lib\site-packages\psycopg2\extras.py", line 81, in fetchall res = super(DictCursorBase, self).fetchall() File "C:\Python27\ArcGIS10.2\Lib\decimal.py", line 543, in new m = _parser(value.strip()) TypeError: 'NoneType' object is not callable

Failed to execute (Script).

The script itself is 800 lines, but here is the query I have been running that errors out:

def value_query(id_field, id, value_fields, start_date, end_date, date_field, table, cur):
    query2 = "SELECT "
    for field in value_fields:
        query2 += "NULLIF({0}, '-999')::NUMERIC(6,2),".format(field)
    query2 += "{0} " \
            "FROM {1} " \
            "WHERE {2} = '{3}' AND {0} BETWEEN '{4}' AND '{5}' " \
            "ORDER BY {0} ASC;".format(date_field, table, id_field, id, start_date, end_date)
    #print "This is Query:"
    #print query

    results = cur.fetchall()

    #print "These are value query results:\n\n {0}".format(results)
    return results

Like I said it runs once in ArcGIS then errors out. However, if I close Arc completely and run the exact same script again, it runs once then stops. I feel like there may be some sort of caching or something that Arc does, but am completely stumped.

1 Answer 1


I had a similar problem and as a work around I changed the decimal values to text values in my postgres database. For whatever reason, there was no issue retrieving text query results. I cast them back to floats later in the python script.

  • This was the issue. Thank you very much for the tip!
    – user28563
    Jun 2, 2014 at 20:47

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