This error is caused by the versaSRS virtual directory in the same web application as SharePoint.
To fix this, you can do either one of the following;
1) You can add the partitionResolverType attribute to the sessionState node of the web.config file in versaSRS virtual directory so that it looks like this:
<sessionState mode="InProc" partitionResolverType="" ...
2) You can remove the versaSRS virtual directory from the SharePoint web application and recreate it on another web site not running SharePoint. Just make sure it's not running on the same application pool as SharePoint.
Let us know how you go.
Regards
Chean Phu
Senior Software Architect
VersaDev Group
www.versadev.com
134 Gilbert Street
Adelaide, South Australia, 5000
Tel: +61 8 8463 1914
Fax: +61 8 8212 8447
Sales: sales@versadev.com
Support: support@versadev.com
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