975 Unless otherwise noted, items below require TWS version 975 or higher. Socket-based DDE API: We have released a new open source DDE API that can now be launched independently of TWS, and includes the same functionality of the socket APIs. Market Depth Requests: A primary exchange field has been added to market depth requests to prevent ambiguity for Smart-routed depth requests. Python Fix: An issue that caused automatic disconnection after 20 seconds when using Python has been fixed. ActiveX Fix: In the sample ActiveX spreadsheet, the order placement and scanner subscription functions have been fixed.