Error: ActivityInstanceDestination property not available on given context

Add a Server Event (just before the client event on the same activity) and a Datafield in your process.
In your server events’ code, populate the datafield with the value of the K2.SerialNumber or K2.ActivityInstanceDestination.ID.
E.g. I created a data field in the process called abcd.
K2.ProcessInstance.DataField["abcd"].Value=K2.ActivityInstanceDestination.ID.ToString();

Use the datafield in the Escalation mail, instead of using the Workflow Context object, use the value.from your datafield to build up your URL.

Let me know if this works.

Vernon

Hello Vernon,

Thanks for ur suggestion...

I have set datafields value in mail events code.

Following is the line, which I have added to mail events code:

K2.ProcessInstance.DataField["abcd"].Value=K2.ActivityInstanceDestination.ID.ToString();

And this datafield i have refered in escalation rules infopath link.

And its working fine...