# Error in mismatched columns: consuming ws messages
**URL:** https://forum.alpaca.markets/t/error-in-mismatched-columns-consuming-ws-messages/4310
**Category:** App-Integration
**Created:** [February 5, 2021, 10:35pm UTC](https://forum.alpaca.markets/t/error-in-mismatched-columns-consuming-ws-messages/4310 "2021-02-05T22:35:19Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Greengage](https://forum.alpaca.markets/u/Greengage)
#### Post date: [February 5, 2021, 10:35pm UTC](https://forum.alpaca.markets/t/error-in-mismatched-columns-consuming-ws-messages/4310/1 "2021-02-05T22:35:19Z")
I am stuck on this issue. This is the code that was written in the Medium post. I have been trying to debug it. I have it to this point where it appears to get the ticker data and historical data but then hits a wall and cites mismatch columns. I’m not sure what I need to align. Any help would be appreciated.
primary@wm1:~$ python3.6 wm4\_v3.txt
Getting current ticker data…
Success.
Tracking 309 symbols.
Getting historical data…
1/309
Success.
Watching 309 symbols.
ERROR:root:error while consuming ws messages: cannot set a row with mismatched columns
^CTraceback (most recent call last):
File “/home/primary/.local/lib/python3.6/site-packages/alpaca\_trade\_api/stream2.py”, line 331, in run
loop.run\_until\_complete(self.consume())
File “/usr/lib/python3.6/asyncio/base\_events.py”, line 484, in run\_until\_complete
return future.result()
File “/home/primary/.local/lib/python3.6/site-packages/alpaca\_trade\_api/stream2.py”, line 316, in consume
self.data\_ws.consume(),
File “/home/primary/.local/lib/python3.6/site-packages/alpaca\_trade\_api/polygon/streamconn.py”, line 108, in cons
ume
await self.\_consume\_task
File “/home/primary/.local/lib/python3.6/site-packages/alpaca\_trade\_api/polygon/streamconn.py”, line 114, in \_con
sume\_msg
await self.\_dispatch(data)
File “/home/primary/.local/lib/python3.6/site-packages/alpaca\_trade\_api/polygon/streamconn.py”, line 221, in \_dis
patch
await handler(self, channel, ent)
File “wm4\_v3.txt”, line 192, in handle\_second\_bar
minute\_history[symbol].loc[ts] = new\_data
File “/home/primary/.local/lib/python3.6/site-packages/pandas/core/indexing.py”, line 670, in **setitem**
iloc.\_setitem\_with\_indexer(indexer, value)
File “/home/primary/.local/lib/python3.6/site-packages/pandas/core/indexing.py”, line 1626, in \_setitem\_with\_inde
xer
self.\_setitem\_with\_indexer\_missing(indexer, value)
File “/home/primary/.local/lib/python3.6/site-packages/pandas/core/indexing.py”, line 1856, in \_setitem\_with\_inde
xer\_missing
raise ValueError(“cannot set a row with mismatched columns”)
ValueError: cannot set a row with mismatched columns
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
---
### Author:  [@Greengage](https://forum.alpaca.markets/u/Greengage)
#### Post date: [February 8, 2021, 3:28pm UTC](https://forum.alpaca.markets/t/error-in-mismatched-columns-consuming-ws-messages/4310/2 "2021-02-08T15:28:38Z")
Resolved this issue. Followed direction from the Github post.