I was just searching around in my database, and when I close gramps, this was onthe terminal:

Cannot estimate birth of Bridget
Warning: DbBsddb: Exception occurred in callback function.
Traceback (most recent call last):
  File "/home/Frog/trunk/src/gen/utils/", line 405, in emit
  File "/home/Frog/.gramps/gramps33/plugins/TimelinePedigreeView/", line 731, in person_rebuild
  File "/home/Frog/.gramps/gramps33/plugins/TimelinePedigreeView/", line 794, in Tree_Rebuild
    Pos50 = ActivePersonX + ( self.Tree_EstimateBirth( LstDescendants[0] ).get_year() - 1950 ) * 11
AttributeError: 'NoneType' object has no attribute 'get_year'

Sincerely yours,
Rob G. Healey