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Object reference failure, debug not available

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Chris asked on 22 Jul 2013, 11:38 PM

I'm having a problem with my report and so far i have not been able to debug it at all. I've set debug points on my data source but it just does not hit any of them. The report seems to have broken after i enabled SQL session state. I have a webviewer set to display the report and it is returning this instead.

HTTP/1.1 200 OK
Cache-Control: private
Content-Length: 1692
Content-Type: text/html; charset=utf-8
Server: Microsoft-IIS/7.5
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Mon, 22 Jul 2013 23:23:11 GMT

<html>
<head>
<link rel="stylesheet" type="text/css" href="/mysite/Telerik.ReportViewer.axd?name=Resources.ParametersArea.css&optype=Resource&version=6.0.12.215" />
</head><body style="margin:0;padding:0;background-color:white;">
<form name="mainForm" method="post" action="Telerik.ReportViewer.axd?instanceID=3f7311afc6d84ca6ae6a67c924abbd0b&optype=Parameters&bgColor=white" id="mainForm" onclick="FormClick();" style="width:100%;border-width:0px;padding:0px;margin:0px;">
<div>
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUBMA9kFgJmDxYEHgdvbmNsaWNrBQxGb3JtQ2xpY2soKTseBXN0eWxlBTN3aWR0aDoxMDAlO2JvcmRlci13aWR0aDowcHg7cGFkZGluZzowcHg7bWFyZ2luOjBweDsWAmYPZBYCZg9kFgRmD2QWAmYPDxYEHgVXaWR0aBsAAAAAAABZQAcAAAAeBF8hU0ICgAJkZAIBD2QWAmYPDxYEHwIbAAAAAAAAWUAHAAAAHwMCgAJkZGRlmxY10PAf8eqiqtIji5qJxpZjvg==" />
</div>

<script src="/mysite/Telerik.ReportViewer.axd?name=Resources.Parameters.js&optype=Resource&version=6.0.12.215" type="text/javascript"></script><div id="ParametersDiv"><table id="parametersTable" cellspacing="0" cellpadding="0" border="0" style="width:100%;border-collapse:collapse;">
<tr style="height:2px;">
<td style="width:100%;"></td>
</tr><tr id="parametersRow">
<td id="editorsCell" style="width:100%;"><table id="editorsTable" cellspacing="0" cellpadding="0" border="0" style="width:100%;border-collapse:collapse;">

</table></td>
</tr>
</table></div></form>
</body>
</html><script type="text/javascript">
var ParametersPage = new ParametersPage(null, 'init', false, false, false, '', '<br />Object reference not set to an instance of an object.');
</script>

4 Answers, 1 is accepted

answered on 25 Jul 2013, 05:19 PM

Peter,

Thank you for the link, i have reviewed the design considerations and my project appears to be in line.

The report should have a default constructor (constructor without parameters i.e. parameterless constructor).

All my reports have a parameterless constructor and all events are created using the designer

The data source for the report should always be binary serializable.

I am using the report designer to specify an SQL datasource

There would be a call to the default constructor on each action from the report viewer.

The constructor is not being hit before the exception occurs.

Report events should be attached in the default constructor.

Report events are specified in the designer

I currently have two reports using the telerik controls and one of them works and the other one does not. I also can not upgrade to the 2013 version.

Do you have any more thoughts as to why the application fails right after it has reached the constructor?