Hi Khaled -
You have multiple open discussions around SRM with very similar or even duplicate questions. Have you had a chance to take the SRM Admin course?
You may want to open a support ticket since you haven't gotten the answer you need here. Opening more discussions on the same question really won't help you get an answer any faster.
Good luck with your system!
Can you explain in details what exactly is your issue.Are you saying after filling up AOT & PDT and when you are trying to save you SRD you are getting the above mentioned error?