appcmd.exe Crashing repeatedly - RPC over HTTP Autoconfig

Hi Experts

Got a bit of a tricky one that has popped up on an SBS 2008 server.

Started to receive the following errors repeatedly in the event log all of a sudden.  The error pops up every 30-40mins or so.

Event ID: 1000
Source: ApplicationError
Faulting application appcmd.exe, version 7.0.6002.18005, time stamp 0x49e0323b, faulting module kernel32.dll, version 6.0.6002.18005, time stamp 0x49e0421d, exception code 0xc0000142, fault offset 0x00000000000b8fb8, process id 0x3da0, application start time 0x01cacba3867d5588.

This is then proceeded by
Event ID: 2007
Source: RPC over HTTP AutoConfig
The configuration application APPCMD.EXE failed with exit code -1073741502. Command parameters:
list vdir.

I cannot find any info to even start knowing where to look.
Coindientally or not, at the same time, also started to receive these SBS specific errors in my email.

An alert was detected on your network. Further investigation into the issue is recommended.

Computer: ***********
Date/Time generated: 24/03/2010 10:52:00 PM
Title: FSMO roles licensing error
Source: License Compliance service
The FSMO Role Check in the Licensing component did not pass because error 0x80070008 occurred in function f2 [TWDO].
Not enough storage is available to process this command.

Make sure that your DNS server can be contacted and the following services are running: Active Directory Domain Services (NTDS), DNS Server (DNS), Kerberos Key Distribution Center (KDC).  This server will be automatically shut down if the issue is not corrected.

This humble machine was running flawlessly. The only items that have changed at the same time the issues occur are the following:
1. Implemented the MaxCacheTtl registry setting to 2 days (this was due to some websites not being resolved. I have since removed this key for troubleshooting purposes)
2. A NAS was installed on the network (not by myself, have since disconnected and removed from network for troubleshooting purposes) The unit was a QNap of some description.

Any advice on where to start looking would be greatly appreciated.
The above issues are causing backups to fail also, which is of great concern.

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HarleyLAuthor Commented:
Already had a look at that article, it goes into much more specifics that dont relate to what I'm seeing.

Turns out a reboot has solved the problem for now. I had previously scheduled a reboot on it and assumed that it ran but it did not.

I will revisit this again if it returns.
Thanks anyway

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