Session expired
Last updated 5 August 2026
Session expired
This rare error appears when a manual login to your trading account invalidates AutoTrader Web's session. The fix is simple: retry the order first, because AutoTrader Web reconnects automatically. If it keeps failing, validate your API credentials and correct them if needed.
When this happens
- 1 A manual login to your trading account invalidated the AutoTrader Web session, on platforms that do not allow multiple logins into the same account.
- 2 For Kotak Neo, the broker session is no longer valid and the broker replies with unauthorized / 401 (you may see the code 100008).
- 3 For Angel One, an invalid or expired session token (errors AG8001 and AG8002).
- 4 For Upstox, an invalid or expired access token (error UDAPI100050, "Invalid token used to access API").
- 5 For Motilal Oswal, an invalid session or unrecognized token.
- 6 For IIFL (new Markets API), an expired daily access token (the broker returns a 401).
- 7 For Aliceblue, an expired daily access token (error EC087, "Session Expired").
Why this error happens
This error is rare. The main cause is a manual login to your trading account, which invalidates the AutoTrader Web session for that account.
Some platforms, such as Zerodha, Aliceblue, Mastertrust and Finvasia, do not allow multiple logins into the same account. If your account is already being used from AutoTrader Web, then AutoTrader Web already has an active session. A manual login will end the AutoTrader Web session and cause this error.
Kotak Neo users may see this when the broker session is no longer valid. AutoTrader Web reconnects on its own, so retrying is all that is needed — see the Kotak Neo note below.
Please check the broker-specific limitations. If your platform does not allow parallel login, then you (or your client) must not log in to the broker’s trading platform at the same time.
Solution
AutoTrader Web is designed to reconnect automatically. So the first thing to do is retry the order.
If you logged in manually on Finvasia, Aliceblue, Mastertrust or Zerodha, then do the following:
- Finish your work on your trading platform
- Log out from the trading platform
- Log in to AutoTrader Web
- Go to any of these tabs on the main dashboard: orders, positions or margins
- This makes sure AutoTrader Web reconnects to your account
Broker-specific notes
- Angel One users: errors AG8001 (Invalid Token) and AG8002 (Token Expired) mean the session token is no longer valid. Angel One also resets API sessions once every morning. You do not need to do anything for this — AutoTrader Web reconnects on its own. Just retry the order.
- Upstox users: error UDAPI100050 (“Invalid token used to access API”) means the session token is no longer valid. Upstox also expires the token once a day. AutoTrader Web reconnects on its own — just retry the order.
- Motilal Oswal users: an “invalid session” or “unrecognized token” message means the same thing. The token expires once a day; retry the order and AutoTrader Web reconnects.
- IIFL users: a 401 / “unauthorized” usually means the daily access token has expired. The token expires once a day. AutoTrader Web reconnects on its own — just retry the order.
- Aliceblue users: error EC087 (“Session Expired”) usually means the daily access token has expired. The token expires once a day, and AutoTrader Web reconnects on its own — just retry the order. Also avoid logging in to the Aliceblue app or website with the same account while AutoTrader Web is running, as that can end the session.
- Dhan users: if the error is about an invalid or expired token during login, see Dhan login errors.
- Zerodha Kite users: please refer to this knowledge base article.
- Finvasia Shoonya users: please refer to the Finvasia broker guide.
- Kotak Neo users: an unauthorized / 401 reply — you may see it written as
Error from Kotak: [unauthorized] [Not_Ok : 100008] [HTTP : 401]— means the Kotak session is no longer valid. This can happen now and then during the day. AutoTrader Web reconnects on its own within a few seconds, so just place the order again — the order that hit the error was not placed. There is no token for you to enter or renew on a Kotak Neo account, so nothing needs to be updated in AutoTrader Web. If every order keeps failing this way, check that your static IP is still registered with Kotak — see Broker rejects your IP — and then contact support. For account setup, see the Kotak Neo broker guide.
