I am creating a diary study where the participants will give me their email address via an opt-in question. As per the manual I have created two questionnaires. The first is public and contains only the opt-in question. The second was set up with access "mailing." I put an interruption page in the second questionnaire and put in php code to call mailResume() with the parameters (False,1,300) using code from the manual as a template. I also created two mailings. The ID of the mailing I wan sent from the opt-in question is 2 and the id of the one I want sent from the interruption page is 1 (I made them in reverse order).
When I go to the url for the opt-in questionnaire everything starts well. I get an email and it contains a link that directs me to the second questionnaire. After going to the second questionnaire and filling out the information on the second page I get to the interrupt page (which has no questions) and I get an error which says:
"This interview has not been started in context of a mailing. Therefore, mailResume() cannot identify the appropriate recipient."
Can you offer any advice on how to resolve this error ? I have not been able to find what I missed in the instructions.