Does SerializationException lead to OnTaskChanged event not being called?

Question

The sequential workflow that I have created does not trigger the OnTaskChanged event although the task is created.
I am starting the workflow programattically by calling the WorkflowManager.StartWorkflow method from a web service. There is no exception that comes up on the site, the task is created and I am able to also open the taskeditform while editing the task. However when I submit from the taskeditform, the taskchanged event is not being called.
There is a error logged "SerializationException: End of stream encountered before parsing was completed". I am not sure if this could be the reason that the taskchanged event is not triggered. If this is the problem, then how do i check 'End of stream' issue.
Could someone revert on this.

Answer 1

Problem is resolved, thanks to the post in https://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1144240&SiteID=1 

 

OnTaskchanged event is now being triggered after this change, although I wonder task itself should not have been created in the first place.

 

Gerry