Try this to narrow down the issue. Find the query that was submitted to Windchill in one of the logs, such as the TWX application log or httpserver access log. Copy the request to a text editor, and remove the parameters that provided authentication such as sslClientAuth or wt.effectiveUserId. Paste the resulting URL into the address bar of a browser. If the edit removed the correct items, you should get a basic authentication pop up asking for username and password. Login normally. The browser should display the response as an XML or JSON formatted document, and list all the data returned from Windchill. You can use this to see whether it is Windchill truncating the list, or if a full list is returned to Thingworx and TWX only displays the first item from the list.
