Misesmax field output nodeset problem

[JCSchottler]

I've been working on this for a couple of days now and can't seem to wrap my head around this code. I have followed the scripting user manual and a couple other problems on this forum, but I have failed.

I am trying to print the misesmax value of 4 different node sets. I requested misesmaxas the field output over the whole model and assigned 4 different node sets to record the surface and bearing stresses of the contacting instances. I am able to print the misesmax of the whole model, but not the nodesets. I feel like I am close, but I can't get the nodesets to work. The code I have below is very basic for 1 nodeset, but it doesn't seem to be taking out any values.

odb = openOdb(path='C:/Users/Schottler_2/Documents/Abaqus/FinalWork/Abaqus Files part 2/Run5.odb')
lastFrame = odb.steps['Bend'].frames[-1]
endSet=odb.rootAssembly.instances['SCREWRUN5-1'].nodeSets['SCREWSURFACE']
fieldValues=lastFrame.fieldOutputs['MISESMAX'].getSubset(region=endSet)
fieldValues2=fieldValues.getSubset(region=endSet).values
max = 0
for v in fieldValues2:
if(v.data>max):
max=v.data()

values = [max]
print values

It is just printing 0, not the misesmax of the set.

Any help is appreciated!!!