Windows Server 2008 adprep /forestprep error 112

Running adprep /forestprep on Windows Server 2003 from the Windows 2008 dvd. Goes through each step successfully then gets error at the end. Any ideas on this error?


Adprep was unable to complete because the call back function failed. [Status/Consequence]Error message: Error(112) while running ""C:\WINNT\system32\LDIFde.exe" -o ObjectGuid -d "CN=DS-UI-Default-Settings,CN=408,CN=DisplaySpecifiers,CN=Configuration,DC=bei,DC=ca" -u -f "C:\DOCUME~1\ntadmin\LOCALS~1\Temp\1\TMP120.tmp" -s bei-dc2.bei.ca". (0x80004005).[User Action] Check the log file ADPrep.log, in the C:\WINNT\debug\adprep\logs\20100420232230 directory for more information.
[2010/04/20:23:35:49.031]
Adprep was unable to update forest information. [Status/Consequence]Adprep requires access to existing forest-wide information from the schema master in order to complete this operation.[User Action]Check the log file, ADPrep.log, in the C:\WINNT\debug\adprep\logs\20100420232230 directory for more information.

The command which is causing you errors is necessary that is should be run on the Infrastructure Master role holder. At the same time you must be logged in with Admin rights in domain. It is here necessary to check the GPO's and make the EA, DA, System very certain with minimum read for full control. Also ensure that the DC are registered on the DNS of your severs.