When view 10 to 20 pages pdf file in rad pdfviewer , we getting blank page in thumbnail

[M Kumar]

Hi,
  We are try to use Rad Pdf viewer which load pdf file with 10 to 20 pages, in that some of thumbnail showing blank page and when click that blank page thumbnail we getting error like "Object reference not set to an instance of an object", If close and open it show blank page for different pages.
Our code is :

        Me.RadPdfViewer1.LoadDocument(System.Windows.Forms.Application.StartupPath + "\pdf\Sample.pdf")

Here we attach error screenshot and exe and testing file at your end, We cant send whole project bcz size more that 30 mb, so we send exe and testing file, In form load event just used above one line code.

Pls reply asap

Thanks

[Dess | Tech Support Engineer, Principal]

Hi, Kumar,

I have noticed that the referred assemblies are pointing to an old version:

I have tested loading the provided document with the latest version of the Telerik UI for WinForms suite and it seems to load properly:

I would highly encourage you to upgrade in order to benefit all the introduced improvements in RadPdfViewer during the 5 years gap.

Off topic, please avoid sharing the Telerik assemblies in the public forum. We suggest you use a support ticket. Moreover, it would be handled before a forum thread.

Thank you for your understanding.

Regards,
Dess | Tech Support Engineer, Principal
Progress Telerik

[M Kumar]

Thank you for ur reply, we will check with latest Telerik version, and one more thing there is no option for make this as private question,  in Asp Ajax got checkbox to make as private i think.

Thanks..

[Dess | Tech Support Engineer, Principal]

Hi, Kumar,

If you have a valid Telerik license for the respective product, you are allowed to submit support tickets directly from your Telerik account. This tutorial will guide you through the process of contacting the Support team of the Telerik UI for WinForms product in a private discussion. 

https://docs.telerik.com/devtools/winforms/knowledge-base/submit-support-tickets 

[Dess | Tech Support Engineer, Principal]

Kumar,

It would be greatly appreciated if you can provide a screenshot of the checkbox you mentioned for making the discussion private for the Ajax forum. Thank you in advance.