Understanding desc.fields

First time poster so I hope I did this right. I'm relatively new to Python scripting and am trying to understand the error I'm getting.

I have the following simple code and what I don't understand is why PAD_HI_250extent generates the Method fields does not exist error? They are both polygon feature classes stored in the same file gdb. Is there a difference in the two feature classes that I'm not aware of? Can the content of the fields, as opposed to the field name themselves, affect this (I do know that there are special characters, e.g., K'au Forest Reserve)

Running ArcMap 10.1 on Win7, Python 2.7.2

=================================================================================

SCRIPT

import arcpy, time

set environment settings

arcpy.env.overwriteOutput=True arcpy.env.workspace = r"F:\USER\FLATHER\TE_AtRisk_grid_model\FeatureClasses.gdb"

files = ["BOC_HI_BG_250extent", "PAD_HI_250extent"]

for file in files: print 'File:', file desc = arcpy.Describe(file) fieldnames = [f.name for f in desc.fields if f.type not in ["Geometry", "Raster", "Blob"]] print fieldnames print ' '

==================================================================================

OUTPUT

File: BOC_HI_BG_250extent [u'OBJECTID', u'FID_HI_fishnet_250sqmi', u'FID_BOC_HI_BlockGroups', u'STATEFP', u'COUNTYFP', u'TRACTCE', u'BLKGRPCE', u'GEOID', u'NAMELSAD', u'MTFCC', u'FUNCSTAT', u'ALAND', u'AWATER', u'INTPTLAT', u'INTPTLON', u'Shape_Length', u'Shape_Area', u'tot_area', u'fishnetID']

File: PAD_HI_250extent

Traceback (most recent call last): File "F:/USER/FLATHER/TE_AtRisk_grid_model/scripts/DDD_descfields.py", line 15, in fieldnames = [f.name for f in desc.fields if f.type not in ["Geometry", "Raster", "Blob"]] AttributeError: DescribeData: Method fields does not exist