This dialog appears when the software encounters difficulty placing cloned objects without overlapping using the Scatter Objects dialog. The dialog text tells you how many attempts the software has made to place a specific object, and asks you if you want to try again.

Try Again—Click this button to force the software to make N more attempts, where N is set in the How Many More Attempts field.
Skip This One—Instructs the software to stop trying to place the current object and proceed to the next.
Quit Trying—Aborts the Generate Locations process; no more objects will be placed.