Requiring attachments for stage entry

Validate case attachments at run time to ensure that a case contains relevant files before it enters a stage.

1. In the navigation panel of Dev Studio, click Case types, and then click the case type that you want to open.
2. On the Workflow tab, click Life cycle.
3. Click a stage name.
4. Click Validation.
5. Click + Add required attachment to display a list of attachment categories that are supported by your case type.
6. Select an attachment category from the list.
7. Click Save.

Result: 

At run time, your application displays an error if the case does not have at least one attachment in each of the required attachment categories.