Suppose I have 5 activity stages in sequence in a Datastage sequencer job. I have checked the box "Do not checkpoint run" for activity 2 and 4 stages. For other activity stages the box is not checked. Suppose if the sequencer fails at activity5. In normal case upon restart it should start from activity5. But here will the sequencer start from activity 2 since I have checked the box.
No - if you check "Do not checkpoint run" the activity will be run at every restart. So in your case after an abort of activity 5: