Hi cho laiw17892104,
This Error is mostly attributed to the file not being present at the time of activity execution.
I understand that the Delivery was successful for other Recipients, but maybe the Delivery did not find the file to send to affected Recipients.
Is there a pattern which is observed for these 70+ Recipients which are left out.
Were these last on the list, there could be process running simultaneously which could have deleted the csv file later during the Delivery Activity.
The second attempt of Delivery job was successful which had lesser number of Recipients.
Has this been observed for some other files as well, especially with lesser number of Recipients.