Could not load file or assembly 'Telerik.OpenAccess...

[neebs]

I've deployed a web application to a different server and suddenly I am getting the error in the attached image. I am not using OpenAccess and I have no idea why a reference to RadScriptManager could cause the page to blow up this way. Any explanation for this behavior?

Steve

[Alexander]

Hi neebs,

Is it possible that your project was "enabled" for OpenAccess but you have removed the persistent model at some point? When persistent classes are added to a project, OpenAccess inserts the following directive at the bottom of the project file:

<Import Condition="Exists('$(MSBuildExtensionsPath)\OpenAccess.targets')" Project="$(MSBuildExtensionsPath)\OpenAccess.targets" />

Please open the project file with a text editor and delete this line if you find it. Additionally you have to make sure that there are no references to OpenAccess assemblies left.

Regards,
Alexander
the Telerik team

[Clyde]

This happened to me today straight after I upgraded to the 2011 Q3 release for both the AJAX and Reporting controls. I had manually updated the dlls from both suites into my project bin directory.

I eventually found the issue was that I had included the Telerik.Reporting.DatabaseSession.dll in my copy. I can only assume it has a dependency on OpenAccess. Once I deleted that file, the problem went away.

Hope this is helpful to someone else too.

[Ivan]

Hi Clyde,

The Telerik.Reporting.DatabaseSession assembly is intended for internal use only by the Telerik Reporting engine, when you are utilizing the Database Session State Provider. You are not supposed to add an explicit reference to it in your project, and it does not expose any publicly available functionality anyway. The correct method to configure the Database Session State Provider is described in the following help topic from the online documentation: Configuring the Database Session State Provider. A more detailed explanation about the session state management system of Telerik Reporting can be found here: Session State Management.

  You are correct that the Database Session State Provider uses Telerik OpenAccess internally, however installing OpenAccess is not strictly required, since the Telerik.Reporting.DatabaseSession assembly contains a stripped-down version of the OpenAccess database engine embedded directly into it, and the references to the OpenAccess assemblies are resolved dynamically at runtime. This also explains why  you receive compile-time errors when you add a reference to Telerik.Reporting.DatabaseSession in your project and you do not have OpenAccess installed.

Regards,
Ivan
the Telerik team

[Berrabah]

Hi Ivan,
I have the same problem,so where should I find the line <Import Condition="Exists('$(MSBuildExtensionsPath)\OpenAccess.targets')" Project="$(MSBuildExtensionsPath)\OpenAccess.targets" />
to delete,
I attache a VB library that contient the telerik reporting according to my site web but I DONT USE TELERIK.OPENACCESS !!!
Thank you

[Zoran]

Hi Berrabah,

 I am not sure I completely understood you question? Are you using Telerik Reporting and not OpenAccess. If that is the case, then please just remove the reference in your project to the Telerik.Reporting.DatabaseSession.dll. Otherwise, I would like to have more detailed information about your project setup so we can find the actual cause for your problem.

All the best,
Zoran
the Telerik team

[Berrabah]

hi  Zoran and thank you for your help,
I have solved the problem, I have deleted the old reporting library and replace itt by an other new one and that work
Thank's TELERIK Masters