name 'algoritm' is not defined

[12345Mohamed]

Traceback (most recent call last):
File "C:\Users\Mohamed\Desktop\pso_path_finding-master_main_.py", line 12, in
start()
File "C:\Users\Mohamed\Desktop\pso_path_finding-master\gui.py", line 100, in start
sol = algoritm(population, generations, OBSTACLES)
NameError: name 'algoritm' is not defined