Error in python script Value Error

[Rabia786]

Hello,
I am doing this ABAQUS script as below however it continues to give me a Value Error, part where Value Error is I have shown below:
# Apply concentrated force at the specified point
top_point = part.vertices.findAt(((length / 2, height, width / 2),))
top_point_set = part.Set(vertices=top_point, name='LoadPoint')
model.ConcentratedForce(name='AppliedForce', createStepName=step_name,
region=top_point_set, cf3=-force_magnitude)

Can anyone please help me how to fix this?

#*
#* The input file was not generated.
#* ValueError: The following loads reference regions which
#* cannot be found in the current model:
#* AppliedForce
#*
#*
#* The input file was not generated.

 

[FEA way]

Check if findAt is working properly - see if top_point actually contains the desired point.