I have also seen the same message twice in the past few days. Everything is operational on our ASA. I also received the service recovery message after receiving the flash warning message. We have not had any problems with our ASA and we have not noticed any interruption in scanning.
We opened a TAC case for this. And we received the following response...The error your getting is a known cosmetic error. It will not affect anything. There is currently no work around at the moment. This is normal, there is a built in mechanism that automatically cleans up the flash."
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...