# Logic 2.4.7 Error using .launch() from Unittest

**URL:** <https://discuss.saleae.com/t/logic-2-4-7-error-using-launch-from-unittest/2267>\
**Category:** Logic 2 Software\
**Created:** [June 9, 2023, 3:27pm UTC](https://discuss.saleae.com/t/logic-2-4-7-error-using-launch-from-unittest/2267 "2023-06-09T15:27:27Z")\
**Posts on this page:** 1\
**Showing post:** 1

<div class="post-metadata">

**Author:** ![joshmansky](https://avatars.discourse-cdn.com/v4/letter/j/fbc32d/32.png) [@joshmansky](https://discuss.saleae.com/u/joshmansky)\
**Post date:** [June 9, 2023, 3:27pm UTC](https://discuss.saleae.com/t/logic-2-4-7-error-using-launch-from-unittest/2267/1 "2023-06-09T15:27:27Z")

</div>

```auto
import unittest
import time
from saleae import automation

def main():
    logic_2 = automation.Manager.launch()
    time.sleep(10)
    logic_2.close()

class TestLogicLaunch(unittest.TestCase):

    def test_logic_launch(self):
        logic_2 = automation.Manager.launch()
        time.sleep(10)
        logic_2.close()

if __name__ == ' __main__':
    main()

```

I have simplified my code to the simplest version to demonstrate the problem. In the code above, when I run the program from the terminal, thus just executing the main function, the program executes without error, producing the result:

```auto
INFO:saleae.automation.manager:sub ChannelConnectivity.IDLE
INFO:saleae.automation.manager:sub ChannelConnectivity.CONNECTING
INFO:saleae.automation.manager:sub ChannelConnectivity.TRANSIENT_FAILURE
INFO:saleae.automation.manager:sub ChannelConnectivity.READY

```

However, when I run the same code in a test case(as the test\_logic\_launch function, using vscode’s testcase runner) the automation.Manager.launch() function fails to execute producing the following error:

```auto
test_logic_launch (Logic2_launch_test.TestLogicLaunch) ... ERROR
NoneType: None

======================================================================
ERROR: test_logic_launch (Logic2_launch_test.TestLogicLaunch)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "c:\Users\jmansky\Desktop\Logic2_launch_test.py", line 13, in test_logic_launch
    logic_2 = automation.Manager.launch()
  File "C:\Users\jmansky\AppData\Local\Programs\Python\Python39-32\lib\site-packages\saleae\automation\manager.py", line 384, in launch
    return cls(
  File "C:\Users\jmansky\AppData\Local\Programs\Python\Python39-32\lib\site-packages\saleae\automation\manager.py", line 310, in __init__
    raise exc from None
  File "C:\Users\jmansky\AppData\Local\Programs\Python\Python39-32\lib\site-packages\saleae\automation\manager.py", line 290, in __init__
    app_info = self.get_app_info()
  File "C:\Users\jmansky\AppData\Local\Programs\Python\Python39-32\lib\site-packages\saleae\automation\manager.py", line 417, in get_app_info
    reply: saleae_pb2.GetAppInfoReply = self.stub.GetAppInfo(saleae_pb2.GetAppInfoRequest())
  File "C:\Users\jmansky\AppData\Local\Programs\Python\Python39-32\lib\site-packages\grpc\_channel.py", line 1030, in __call__
    return _end_unary_response_blocking(state, call, False, None)
  File "C:\Users\jmansky\AppData\Local\Programs\Python\Python39-32\lib\site-packages\grpc\_channel.py", line 910, in _end_unary_response_blocking
    raise _InactiveRpcError(state) # pytype: disable=not-instantiable
grpc._channel._InactiveRpcError: <_InactiveRpcError of RPC that terminated with:
	status = StatusCode.UNAVAILABLE
	details = "failed to connect to all addresses; last error: UNAVAILABLE: ipv4:127.0.0.1:10430: WSA Error"
	debug_error_string = "UNKNOWN:failed to connect to all addresses; last error: UNAVAILABLE: ipv4:127.0.0.1:10430: WSA Error {created_time:"2023-06-09T15:20:54.490186608+00:00", grpc_status:14}"
>

----------------------------------------------------------------------
Ran 1 test in 21.201s

FAILED (errors=1)

```

I do not understand why running the launch function inside of unittest would cause this error to occur. Any help or potential solutions would be greatly appreciated.

---

_[View the full topic](https://discuss.saleae.com/t/logic-2-4-7-error-using-launch-from-unittest/2267)._