MemoryError on pc 8gb RAM

[McDon1]

ERROR: 2021-12-22 15:57:48,066 Could not find any function with matching selector
Traceback (most recent call last):
File "/home/watch/Desktop/sniper/sniper.py", line 624, in scan
decoded = contract.decode_function_input(input_bytes)
File "/home/watch/.local/lib/python3.9/site-packages/eth_utils/decorators.py", line 18, in _wrapper
return self.method(obj, *args, **kwargs)
File "/home/watch/.local/lib/python3.9/site-packages/web3/contract.py", line 466, in decode_function_input
func = self.get_function_by_selector(selector)
File "/home/watch/.local/lib/python3.9/site-packages/eth_utils/decorators.py", line 18, in _wrapper
return self.method(obj, *args, **kwargs)
File "/home/watch/.local/lib/python3.9/site-packages/web3/contract.py", line 459, in get_function_by_selector
return get_function_by_identifier(fns, 'selector')
File "/home/watch/.local/lib/python3.9/site-packages/web3/contract.py", line 1682, in get_function_by_identifier
raise ValueError(
ValueError: Could not find any function with matching selector
ERROR: 2021-12-22 15:59:56,847
Traceback (most recent call last):
File "/home/watch/Desktop/sniper/sniper.py", line 954, in
run()
File "/home/watch/Desktop/sniper/sniper.py", line 945, in run
scan(tokens)
File "/home/watch/Desktop/sniper/sniper.py", line 667, in scan
buy_many(pending, token, nonce)
File "/home/watch/Desktop/sniper/sniper.py", line 849, in buy_many
amount = token['BUYAMOUNT'] * DECIMALS
MemoryError

I got error with 4gb ram, still error on 8gb ram machine