Assignment 2 level 3 submission - GenerateYearlyReport

I am trying to run my assignment 2 (Generate yearly report for vendors) and everything works fine then automatically program stops at particular page. Like it has downloaded monthly reports and generated yearly reports for 5 vendors and then suddenly while downloading monthly report for 6th vendor, it stops at one point. If there is some problem with the code it shouldn’t have been processed 5 items.
Another error I am getting is shown as attached

What is this error is set transaction status.xaml? Why ‘processing transaction number 2’ is showing again while vendor id is showing different.
Pls help.