System.InvalidOperationException: The event receiver context for Workflow is invalid.
 at Microsoft.SharePoint.SPEventReceiverDefinition.ValidContext()     at
icrosoft.SharePoint.SPEventReceiverDefinition.ValidReceiverFields()     at Microsoft.SharePoint.SPEventReceiverDefinition.GetSqlCommandToAddEventReceivers(IList`1 erds)     at Microsoft.SharePoint.Workflow.SPWinOESubscriptionService.CommitNewSubscriptions(Transaction txn, IList`1 erds)

Me.icVisaTaskID = Guid.NewGuid