Runtime error r6025 pure virtual function call

Microsoft Visual C++ Runtime Library error R6025 pure virtual function call error shows up in windows sdk demo project during chat.

Which version?
Knowing the version can help us to identify your issue faster.

To Reproduce(If applicable)
Steps to reproduce the behavior:

  1. After SDK Auth, Join meeting without login using MeetingID, Password, Name.
  2. Click on Show Chat button.
  3. Error randomly pops up.


Device (please complete the following information):

  • PC
  • Windows 10

Additional context
The problem always occurred during screen/video shared by host. Although, didn’t try without screen/video being shared.


Any update on this issue?

Muhammad Ahmed

Hi @mohdahmed,

Thanks for the post. What is the SDK version you are using? Could you provide the SDK log and the dump (.dmp) files so that we could further investigate? We have tried to follow the steps you are mentioning and we are not able to experience the issue.


i encountered the same problem not have fixed it yet -fyi i have a ryzen processor maybe its a stability isuue thanks in adnvance

got the same issues, also have a ryzen cpu