Why can I not preview my intervention?

Firstly, try closing the authoring tool and opening it again. If this does not work, check the following:

No Show logic

All LifeGuide interventions require show logic in the intervention.lgil file to view the pages in a web browser. See How_to_make_sure_that_users_see_intervention_pages_in_the_correct_order#Showing_intervention_pages_in_the_correct_order for more information.

Java

If you see HTP error 503 when trying to preview your intervention, please check which version of Java is installed on your computer.

IMPORTANT: The most recent Authoring tool comes with embedded Java. This means that you no longer need to change your Java settings on your computer. You can download it from the LifeGuide Community Server here: https://www.lifeguideonline.org/releases/authoring

Earlier versions of LifeGuide require Java Version 6 or 7, 32-bit. Unfortunately, Preview does not work with Java Version 8. If you have Java 8, you will need to uninstall it and install 6 or 7 to preview your intervention : http://www.java.com/en/download/help/uninstall_java.xml

N.B. The version of Java does not relate to the version of Windows that you are using, so if you have Windows 64-bit, you can still use the 32-bit version of Java, which is needed for previewing your intervention.

Please restart LifeGuide before trying to preview your intervention again.

NB. You do NOT need an internet connection to view your intervention in Preview mode.

The error "This intervention does not exist"

When importing your intervention, you may have used special characters (e.g. -, +), a space, or started the intervention name with a number. This will cause an error when previewing, so please import your intervention and give it a name that begins with a letter and don't use any special characters (underscores are accepted) or spaces in the intervention name.