DICOM echo from DCM4CHE results in exception "NameError: global name 'SOPClassExtentedNegociationSubItem' is not defined"

[talbarda]

Hey,
I've implemented a simple "DICOM listener" that listens to incoming DICOM objects (code later) and I've an issue that when sending a DICOM echo from a DCM4CHE server I get an exception:
Exception in thread Thread-1:

**> Traceback (most recent call last):

File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py", line 810, in __bootstrap_inner
self.run()
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pynetdicom-0.8.1-py2.7.egg/netdicom/DULprovider.py", line 274, in run
if self.CheckNetwork():
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pynetdicom-0.8.1-py2.7.egg/netdicom/DULprovider.py", line 256, in CheckNetwork
self.CheckIncomingPDU()
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pynetdicom-0.8.1-py2.7.egg/netdicom/DULprovider.py", line 183, in CheckIncomingPDU
self.pdu = Socket2PDU(rawpdu)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pynetdicom-0.8.1-py2.7.egg/netdicom/DULprovider.py", line 327, in Socket2PDU
pdu.Decode(data)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pynetdicom-0.8.1-py2.7.egg/netdicom/PDU.py", line 171, in Decode
tmp.Decode(Stream)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pynetdicom-0.8.1-py2.7.egg/netdicom/PDU.py", line 907, in Decode
while NextSubItemType(Stream) is not None:
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pynetdicom-0.8.1-py2.7.egg/netdicom/PDU.py", line 1136, in NextSubItemType
return SOPClassExtentedNegociationSubItem
NameError: global name 'SOPClassExtentedNegociationSubItem' is not defined**

It's important to say that DICOM PUSH (C-MOVE) is working good,

I saw comment in saying SOPClassExtentedNegociationSubItem on class SOPClassExtentedNegociationSubItem, where in , if ItemType == 0x56 it should return this class
What could be wrong??

As for my code (maybe I'm doing something wrong):
author = 'talbarda'
from netdicom.applicationentity import AE
from netdicom.SOPclass import *
from dicom.dataset import Dataset, FileDataset
from dicom.UID import ExplicitVRLittleEndian, ImplicitVRLittleEndian, ExplicitVRBigEndian
import os

TRANSFER_SYNTAX = [ExplicitVRLittleEndian,
ImplicitVRLittleEndian,
ExplicitVRBigEndian]

ae_title = 'SOME_AE_TITLE'
pacs_port = 9996
STUDIES_PATH='/tmp/studies'

def ensure_dir(f):
d = os.path.dirname(f)
if not os.path.exists

def _get_study_path(study_id):
return os.path.join(STUDIES_PATH, study_id)

def _get_series_path(study_path, series_id):
return os.path.join(study_path, series_id)

def get_dicom_path(DS):
series_path = _get_series_path(_get_study_path(DS.StudyInstanceUID), DS.SeriesInstanceUID)
dicomUID = str(DS.InstanceNumber) + "" + str(DS.SOPInstanceUID) + '.dcm'
return os.path.join(series_path, dicomUID)

def get_dataset_meta():
file_meta = Dataset()
file_meta.MediaStorageSOPClassUID = '1.2.840.10008.5.1.4.1.1.2'
file_meta.MediaStorageSOPInstanceUID = "1.2.3" # !! Need valid UID here
file_meta.ImplementationClassUID = "1.2.3.4" # !!! Need valid UIDs here
return file_meta

def store_ds(dataset_to_store, sop_instance_uid, study_id):
filename = _get_dicom_path(dataset_to_store)
ds = FileDataset(filename_or_obj=filename, dataset=dataset_to_store, file_meta=get_dataset_meta(),
preamble="\0" * 128)

validate the file's directory exists, and if not create it

ensure_dir(filename)
ds.save_as(filename)

def on_receive_store(SOPClass, received_dataset):
curr_study_id = received_dataset.StudyInstanceUID
curr_series_id = received_dataset.SeriesInstanceUID
curr_sop_instance_uid = received_dataset.SOPInstanceUID
print(
"Got message of:\nstudy %r\nseries %r\nsop %r" % (curr_study_id, curr_series_id, curr_sop_instance_uid))

try:
store_ds(received_dataset, curr_sop_instance_uid, curr_study_id)
# must return appropriate status
return SOPClass.Success
except:
print("Failed storing ds %s" % received_dataset)
raise # TODO - return failure?
def on_receive_echo(association):
print("Association response received")

def on_associate_response(association):
print("Association response received")

def on_associate_request(association):
print("Association requested")
return True

print("Starting AE %r on port %s" % (ae_title, pacs_port))
MyAE = AE(AET=ae_title,
port=pacs_port,
SOPSCU=[PatientRootFindSOPClass,
PatientRootMoveSOPClass,
StudyRootMoveSOPClass,
StudyRootFindSOPClass,
VerificationSOPClass],
SOPSCP=[VerificationSOPClass, StorageSOPClass], SupportedTransferSyntax=TRANSFER_SYNTAX)
MyAE.OnAssociateResponse = on_associate_response
MyAE.OnAssociateRequest = on_associate_request
MyAE.OnReceiveStore = on_receive_store
MyAE.OnReceiveEcho = on_receive_echo
MyAE.start()
MyAE.QuitOnKeyboardInterrupt()