When you update your SCOM 2007 R2 to CU4 (Cumulative Update 4), you will have problems to load a management pack with SCOM Authoring Console.
You will receive a message, searching for management pack Microsoft.SystemCenter.Library with Version 6.1.7221.61:
Unfortunately you will found only version 6.1.7221.0 on your disk. Microsoft didn’t published the newer version as separated management pack file (*.mp).
To solve this open your management pack with a text- or xml-editor and change from:
<Reference Alias="SystemCenter"> <ID>Microsoft.SystemCenter.Library</ID> <Version>6.1.7221.61</Version> <PublicKeyToken>31bf3856ad364e35</PublicKeyToken> </Reference>
to:
<Reference Alias="SystemCenter"> <ID>Microsoft.SystemCenter.Library</ID> <Version>6.1.7221.0</Version> <PublicKeyToken>31bf3856ad364e35</PublicKeyToken> </Reference>
Change Version from 6.1.7221.61 to 6.1.7221.0
Save the file and you can open it again in the Athoring Console.