Escalation action ''eMail'' is defined, but the email attribute has not been specified in the ''1'' escalation of the ''0'' task model.
Explanation
If an escalation action is set to 'eMail' an 'email' entry must be defined, which refers to the e-mail message.
User response
Change the escalation action to a different action or define the 'email' entry on the escalation. In IBM Integration Designer, open this task file in the text editor. You should find something like email="DefaultMessage".