Hi,

I have a requirement to share an link to external users with particular attachments alone with Case details. For this requirement I used Pega DWA feature. I used the pxFilePreview control in the External Section to give view access to the attachments for external users. But when I am trying to view the attachment as a external user by clicking the link which sent to my email, I am getting below error. 

THIS REQUEST FOR INFORMATION CANNOT BE PROCESSED (SESSION STATE IS INVALID).

Note : In my requirement cannot send the attachment with email, because in the requirement external users can only view the attachment. Should not allow them to download.

Is there any workaround for above requirement with DWA?