When you exceed your quota
As discussed before if you make multiple submissions to Google to re-index yur pages you will see the message below.
Google have added an enhancement where you can see what pages are indexed and those that are not. They even give you reasons why this is the case allowing you to fix the problem if there is one.
My experience is that the message telling you to try again the next day should emphasize the fact that you need to wait 24 hours. I have found that if I exceed the limit in the evening I have to wait until the next evening to re-submit.