Acivities not showing up on Case View, but Will show up in "Print Report"

[CiviTeacher.com]

I recently upgraded a 3.1 installation using CiviCase to 3.4.5.  The users complain that they cannot see the "activities" on a case when viewing the case. 

They can add activities, search for activities (civicrm/activity/search) , they can also view activities in the contact view 'activities tab' (civicrm/contact/view) but cannot see activities on the case view. 

By case view I mean: /civicrm/contact/view/case

I have attached screenshots.  Is there some configuration issue I have overlooked, or is this a bug? 

[demeritcowboy]

Two thoughts:

Your screenshot of manage case shows the word "processing..." - is it timing out or something while retrieving the activities? Do the civi or web server logs indicate any error?

If you expand the search filters triangle, does it show that Deleted Activities or some other filter is checked?

[CiviTeacher.com]

Thanks!  It appears the Settings.xml file was missing from /CRM/Case/xml/configuration    I copied that over from the backup and it was fixed.  The logs make more sense now.

I appreciate the thoughts, sometimes it's great just to get a fresh perspective on the problem.