[Solved] Unable to open Telerik Report Designer

1 Answer 23 Views
Report Designer (standalone)
Nathan
Top achievements
Rank 1
Nathan asked on 25 Sep 2026, 12:05 PM

When I open my installation, I get the following error.

I tried turning on the diagnostics, but no logs appear when I open the application. I can't seem to find any relevant information in the event viewer too.

Are there any other things I could try?

1 Answer, 1 is accepted

Sort by
0
Accepted
Todor
Telerik team
answered on 25 Sep 2026, 01:22 PM

Hello Nathan,

You may find more suggestions in the KB article An Error Has Occurred While Loading the ReportDesigner's Workbench.

For example, there may be an invalid user.config file. You may try to delete or rename it, so the designer can recreate a valid one.

Regards,
Todor
Progress Telerik

Love the Telerik and Kendo UI products and believe more people should try them? Invite a fellow developer to become a Progress customer and each of you can get a $50 Amazon gift voucher.

Nathan
Top achievements
Rank 1
commented on 25 Sep 2026, 04:58 PM

Hey Todor, 

Thanks for the reply.

I tried moving the user.config file, but on startup it doesn't recreate one. Is there a specific way I should be opening up the report designer to get crash logs?

Let me know if any more information would be helpful to solve this issue.

Todor
Telerik team
commented on 28 Sep 2026, 02:54 PM

Hi Nathan,

I suspect you haven't found the correct folder. Note that there is a dedicated folder for each designer version. Inside this folder, there should be a subfolder with your designer's version. For example, my local Standalone Report Designers' folders for our latest version 20.2.26.812 are:

  • For .NET 10:

C:\Users\arabadzhiev\AppData\Local\Progress_Software_Corpora\Telerik.ReportDesigner.Ne_Path_1nhledbthp0p3s05meo5hrvp2noneod0\20.2.26.812\

  • For .NET Framework 4.6.2:

C:\Users\arabadzhiev\AppData\Local\Progress_Software_Corpora\Telerik.ReportDesigner.ex_StrongName_xvg2ahozm2u22wxtsw2egsvlddrzt5hj\20.2.26.812\

You may guess which is the folder by the date of its last modification shown in Windows Explorer.

Here is a link to a muted video showing how the user.config was recreated upon the start of the designer for .NET 10 on my local machine. The behavior is identical for the older designer.

You may also try deleting/renaming the configuration file beside the designer's executable: Telerik.ReportDesigner.Net.dll.config or Telerik.ReportDesigner.exe.config.

If the trace listener attached to the designer doesn't record anything, the other option is to check the Windows Event Viewer. If I understood correctly, though, you didn't find relevant information in any of those.

 

Tags
Report Designer (standalone)
Asked by
Nathan
Top achievements
Rank 1
Answers by
Todor
Telerik team
Share this question
or