How to fix error: The message received from the server could not be parsed

Question

We have a Sharepoint solution that uses AJAX. The button that triggers this is inside an update panel.

One of the things that we do is generate a MS Word document, t

Answer 1

The action that causes this code to execute MUST be a postback event, and not an AJAX call.

This is due to the nature of the way AJAX requests are processed.