COM object that has been separated from its underlying RCW cannot be used

[Boardy]

I'm designing a couple of reports in a class library. Suddenly I keep getting the following error, printed in the report itself, when I try to preview the report:

An error has occurred while processing Report '<report name>': COM object that has been separated from its underlying RCW cannot be used.

After I completely restart Visual Studio, I can generate the report again, without a problem. However, when I make a change, the error comes back.

This restarting is getting tedious. What is wrong? Is there a way to solve this? Or when this happens, is there a quicker way of making the report run again?

Thanks in advance,
   Herre

[Stef]

Hi Herre,

This is a generic error result of other problem occurring on preview of the report.

We will need some additional information on this issue. It would be of great help if you could send us a runnable sample project exhibiting the issue, so we can debug it locally and advise accordingly. The error before the reported one will point to the actual reason for the problem and the stack trace will be of help.

Feel free to open a support ticket and send us the requested details. We can update the thread at the end for anyone concerned.

Regards,
Stef
Telerik

 

 

[Boardy]

Result of the support ticket:

In case you use an EntityDataSource component wrapping a data model from an external assembly, this is a known issue in Visual Studio 2012+ versions, where the assemblies get loaded multiple times on rebuilding the project.  The issue can be resolved with the following steps:

    1. Restart Visual Studio.
    2. Start the EntityDataSource wizard and navigate to the available contexts.
    3. Click cancel.

This work-around does the job. It's better than having to restart VS before each second preview.

Actually I'm using VS 2010...