Error registering the viewer with the service.An error has occurred.Object reference not set to an instance of an object.

[Maheswari]

Hi,

We have installed the latest version of Telerik reports version 11.2.17.913. After installation we removed all the old references and referenced the 11.2.17.913 version of DLLs. Added the latest JS file into our application.Now the problem is we are getting - "Error registering the viewer with the service.An error has occurred.Object reference not set to an instance of an object." on the report viewer. We are using MVC 5 and Visual Studio 2017. Can you please provide a solution ASAP?

Thanks,

Maheswari S.

[Katia]

Hi Maheswari,

The error in the attached screen shot points to the issue with the Reporting REST service. You can go though the steps provided in How To: Add Telerik Reporting REST Web API to Web Application help article and check if any settings are missing. 
Additionally, run Upgrade Wizard in Visual Studio to make sure that the project references were updated correctly.

If the issue persists we would need to check the settings of the viewer, the code in ReportsController and Global.asax.


Regards,
Katia
Progress Telerik

[R.D. Henry and Co.]

I have had the reporting server for 2 years and today I am getting this error and nothing has changed so this must be different from the customer above.  What can I do about this?

Error registering the viewer with the service.
An error has occurred.
Object reference not set to an instance of an object.

[Todor]

Hello Curtis,

If I understood correctly, you use Telerik Report Server.
Does the error occur in the integrated viewer of the Report Server Manager (while attempting to preview reports), or are you using a custom Web application that utilizes the Report Server to deliver reports?

Generally, the error message indicates that the Report Server/REST Service supposed to deliver reports to the Html5 Report Viewer is not working, hence the client (viewer) cannot be registered with the service.

Test re-starting the Report Server from the IIS.

Regards,
Todor
Progress Telerik

[Alaa]

I have telerik reporting service running on two applications on two different iis, and it works perfect, but suddenly it Iam getting this error on one of them, where should be the problem.

 

regards

[Todor]

Hello Alaa,

The error indicates that the REST Service is not responding. If you haven't upgraded Telerik Reporting or changed anything else in the project, you may test to restart the service or the corresponding IIS. Check also the previous posts for other possible steps and help resources.

Regards,
Todor
Progress Telerik

[areal]

I have the same problem, after the server suddenly dies, when it turns on the problem as you experience appears.
Has your problem been resolved, how to do it