UaServerApplicationCallback::logonSessionUser has invalid pUserIdentityToken

[ssmaung]

Hello,
There is no client connecting but there is ExceptionCode: c0000005 (Access violation) at UaServerApplicationCallback::logonSessionUser.
In which situation, OPC UA Server can have invalid pUserIdentityToken?
My OPC UA Server was running about 4 days without user interaction.
Thank you.

[Support Team]

Hi,

was that access violation caused by code that YOU have written/modified yourself?

We have never experienced such behavior, and we have used the UserTokens in the logonSessionUser since many years.