We have begun to see this error with increasing frequency on pending events which will not complete. We are receiving it on new account creates, moves, and on scheduled Groom processes. A single server seems to be presenting most of these errors but we've seen it on others as well. The 220 errors are showing up in the agent log as well. We have NSM 4.0 running on eDirectory managing OES11 file servers. Any ideas on what could cause this issue - please let me know if you would like me to email any logs to you.