Button click, executes method, sometimes takes a long (> 1 min time), populates a grid within an update panel. AsyncPostBackTimeout="600" set, should be plenty of time.

Do this locally and short and long duration works fine.

When deployed to IIS 7 short duration, don't experience any trouble at all.

However, the longer ones just give me the following error:

EDIT: Error on the browser javascript console

Message: 'length' is null or not an object
Line: 2
Char: 18021
Code: 0

EDIT: Currently deployed on a test server therefore below link will not work straight off the bat.

URI: <http://epic/ScriptResource.axd?d=3tx7T6EWzEXOeemUaA1E9w3jSJacOpRDEfIjbEkIyJsG8AMEwHqtpEDV31v-r-fkISDFA9pg2hUPAVQOZf_hy7_e2FwgzwU07O7N-3j58tTVUJEKCPgxWMMo-sJpXo4c0&t=ffffffffbd2983fc>

I really don't know where the length is coming from, the only other javascript I have is this:

```
<script type="text/javascript" language="javascript">
  function CancelClick() {
        alert('Changes have not been saved');
    }

    function StartProcedure() {

        document.getElementById("<%=lblExecute.ClientID%>").innerText = "Procedure currently executing";
   }

</script>

```