During handling of the above exception, another exception occurred: about python-udsoncan

[pylessard]

Hi.

1. Because you did not receive a response from the server. Check the CAN log and make sure that you receive data within proper timing with CAN ID that matches your ISOTP stack.

2. Because the client code raise a TimeoutException when the underlying Connection object raises one. It's just how the code is written. See

   python-udsoncan/udsoncan/client.py

   Lines 1632 to 1639 in c1094bd

   	except TimeoutException:
   	if timeout_type_used == 'single_request':
   	timeout_name_to_report = 'P2* timeout' if using_p2_star else 'P2 timeout'
   	elif timeout_type_used == 'overall':
   	timeout_name_to_report = 'Global request timeout'
   	else: # Shouldn't go here.
   	timeout_name_to_report = 'Timeout'
   	raise TimeoutException('Did not receive response in time. %s time has expired (timeout=%.3f sec)' % (timeout_name_to_report, timeout_value))

I can and will rearrange the code to get a single error message to avoid confusion.

[WSXXB-main]

Thank you for your answer.

 I can understand ISOTP and Client All Raise TimeoutException because the bus really does not respond to the message.
As for the second error：the software Pycharm reports an error "During handling of the above exception, another exception"  .    Can be understood as when  ISOTP & Client all Raise TimeoutException, this second error I encountered is normal？  If the answer is YES， Please close the problem。

[pylessard]

Yes, the second error. You can see in the snippet of code I previously posted that the second exception is raised on purpose.

Will close this issue