couldn't get real-time async data from polygon

[sue6233]

Tried to run and go the following error messages:
135/136
136/136
Success.
Watching 136 symbols.
unknown channel A.VMD (you may need to specify the right data_stream)

Any input on this problem? thanks.

[kunalp11]

I have something similar:
179/179
Success.
Watching 179 symbols.
unknown channel A.ETRN (you may need to specify the right data_stream)
algo.py:376: RuntimeWarning: coroutine 'StreamConn.close' was never awaited
conn.close()
RuntimeWarning: Enable tracemalloc to get the object allocation traceback
Event loop is closed
...
Event loop is closed
Fatal Python error: Cannot recover from stack overflow.
Python runtime state: initialized

Current thread 0x0000326c (most recent call first):
File "C:\Users*\AppData\Local\Programs\Python\Python38\lib\asyncio\base_events.py", line 508 in _check_closed
File "C:\Users*\AppData\Local\Programs\Python\Python38\lib\asyncio\base_events.py", line 591 in run_until_complete
File "C:\Users***\AppData\Local\Programs\Python\Python38\lib\site-packages\alpaca_trade_api\stream2.py", line 275 in run
File "algo.py", line 373 in run_ws

I suspect it's to do with the new API changing the Stream call in the channels = ['trade_updates'] block and tried to swap out the 'A' for 'T' according to the schema. It prevented the error but now the script just sits at "Watching ### symbols." for hours. It takes no action after that so I just end up killing the process. I think I'm on the right track, but not sure if something else needs to be changed as well.

[sue6233]

Or could be to do with too much streaming data? The doc says it only allows 200 api calls/minute. Just error message doesn't say that way. New here.