import asyncio
from agent_framework.microsoft import CopilotStudioAgent
from msal import PublicClientApplication, ConfidentialClientApplication
import traceback
async def main():
agent = CopilotStudioAgent(
environment_id=ENVIRONMENT_ID,
agent_identifier="new_sf",
tenant_id=TENANT_ID,
client_id=CLIENT_ID,
token=TOKEN
)
try:
result = await agent.run("hi")
print(f"Result: {result}")
result1 = await agent.run("tell me the open opportunities in salesforce")
print(f"Result: {result1}")
except Exception as e:
traceback.print_exc()
asyncio.run(main())result1 = await agent.run("tell me the open opportunities in salesforce")
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\agent_framework_copilotstudio\_agent.py", line 258, in _run_impl
response_messages = [message async for message in self._process_activities(activities, streaming=False)]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\agent_framework_copilotstudio\_agent.py", line 330, in _process_activities
async for activity in activities:
...<9 lines>...
)
File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\microsoft_agents\copilotstudio\client\copilot_client.py", line 78, in ask_question
async for activity in self.ask_question_with_activity(activity):
yield activity
File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\microsoft_agents\copilotstudio\client\copilot_client.py", line 105, in ask_question_with_activity
async for activity in self.post_request(url, data, headers):
yield activity
File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\microsoft_agents\copilotstudio\client\copilot_client.py", line 39, in post_request
async for line in response.content:
...<9 lines>...
yield activity
File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\aiohttp\streams.py", line 46, in __anext__
rv = await self.read_func()
^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\aiohttp\streams.py", line 370, in readline
return await self.readuntil(max_size=max_line_length)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\aiohttp\streams.py", line 401, in readuntil
raise LineTooLong(chunk[:100] + b"...", max_size)
aiohttp.http_exceptions.LineTooLong: 400, message:
Got more than 524288 bytes when reading: b'data: {"type":"event","id":"3da033af-d972-49d7-9880-628da9340178","timestamp":"2026-07-22T11:33:41.3...'.
Description
Hi
I am calling the agent created using Copilot Studio.
Whenever I make a request to the Salesforce connector , it gives the following issue -
Code Sample
import asyncio from agent_framework.microsoft import CopilotStudioAgent from msal import PublicClientApplication, ConfidentialClientApplication import traceback async def main(): agent = CopilotStudioAgent( environment_id=ENVIRONMENT_ID, agent_identifier="new_sf", tenant_id=TENANT_ID, client_id=CLIENT_ID, token=TOKEN ) try: result = await agent.run("hi") print(f"Result: {result}") result1 = await agent.run("tell me the open opportunities in salesforce") print(f"Result: {result1}") except Exception as e: traceback.print_exc() asyncio.run(main())Error Messages / Stack Traces
result1 = await agent.run("tell me the open opportunities in salesforce") ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\agent_framework_copilotstudio\_agent.py", line 258, in _run_impl response_messages = [message async for message in self._process_activities(activities, streaming=False)] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\agent_framework_copilotstudio\_agent.py", line 330, in _process_activities async for activity in activities: ...<9 lines>... ) File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\microsoft_agents\copilotstudio\client\copilot_client.py", line 78, in ask_question async for activity in self.ask_question_with_activity(activity): yield activity File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\microsoft_agents\copilotstudio\client\copilot_client.py", line 105, in ask_question_with_activity async for activity in self.post_request(url, data, headers): yield activity File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\microsoft_agents\copilotstudio\client\copilot_client.py", line 39, in post_request async for line in response.content: ...<9 lines>... yield activity File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\aiohttp\streams.py", line 46, in __anext__ rv = await self.read_func() ^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\aiohttp\streams.py", line 370, in readline return await self.readuntil(max_size=max_line_length) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\Z00583RM\Documents\tech\mafcs\.venv\Lib\site-packages\aiohttp\streams.py", line 401, in readuntil raise LineTooLong(chunk[:100] + b"...", max_size) aiohttp.http_exceptions.LineTooLong: 400, message: Got more than 524288 bytes when reading: b'data: {"type":"event","id":"3da033af-d972-49d7-9880-628da9340178","timestamp":"2026-07-22T11:33:41.3...'.Package Versions
agent-framework - 1.10.0, agent-framework-copilotstudio - 1.0.0b260521
Python Version
3.14.3
Additional Context
No response