How To: Debugging Kinetic (Browser) - Experts’ Corner - Epicor User Help Forum (epiusers.help)
This should be:
Message: “%session.context.initialValueIn.ValueIn.employeeID%”
This will only work if you named your value “Param1” in the contextValue object; you can name them whatever you want.
Use a different event downstream. “After” AfterInitialize may work for your needs. You could also try “after” Execute_GetByID. Experiment with events to find the one that works for your needs.