Reading odb file in Abaqus 6.13 (python)

[pablete]

I am trying to run the same scripts in Abaqus 6.13 as I used to run in 6.12. The simulations are OK, but when I try to extract the coordinates of a node set (T_N), it gives only some of them. It gets only about one fourth of the nodes contained in T_N. The same code runs fine in 6.12. Has anyone found a similar problem?

The code:

def myNodesReader(odb):

step = odb.steps['Hit']
timeFrameInitial =step.frames[0]
try:
displacementInitial = timeFrameInitial.fieldOutputs['COORD']
except:
err ="The analysis must include a field output request for variable COORD."
print err
sys.exit(1)

try:
targetNodesInitial = odb.rootAssembly.nodeSets['T_N']
targetDisplacementInitial = displacementInitial.getSubset(region=targetNodesInitial)
except:
err ="T_N must be defined"
print err
sys.exit(1)

outFile = open('InitialNodes_TN.txt', 'w')
print("Nodes from Abaqus stored in memory")

format = '%6i, %14.7e, %14.7e, %14.7e\n'
for value in targetDisplacementInitial.values:
outFile.write(format % ((value.nodeLabel,) + tuple(value.data)))
outFile.close()

If I try to get all the nodes instead of only the nodes from the set T_N, it works fine. I have attached a folder with 4 pictures that explain better the difference between both results.

Thank you everyone!!