February 8, 2008

AJAX, IE6 and System error: -1072896658

Posted in Software at 03:43 by graham

I have just spent a while wrestling with this problem, so in case anyone else comes across it.


  • You are making an AJAX query to your server – in my case using Yahoo’s excellent YUI, connection manager.
  • On IE6, using the Microsoft.XMLHTTP object, you try and read the responseText parameter (or the YUI does for you).
  • IE says msxml3.dll: System error: -1072896658 (nice error eh?)
  • Everything works fine in Firefox


Make sure the response from your server has the correct mime type: ‘text/plain’ if it really is plain text. In my case I was sending a response of ‘text/html’ and sending plain text.

I wish you never experience this problem. If you do, hopefully this has helped you.

1 Comment »

  1. will said,

    January 18, 2010 at 10:25

    thanks for pointing me in the right direction (AJAX) – i found that putting my link to export an image outside an update panel prevented this error

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