Hi All,

I'm was updating a SCOM 2012SP1 to 2012R2 environment for a customer, but when upgrading the first Management server the following error occures;

------OpsMgrSetupWizard.txt-------
Error: :LaunchMSI: MSI E:\Setup\AMD64\Server\OMServer.msi returned error 1603
----------------------------------
------OMServer.txt----------------
Product: System Center Operations Manager 2012 Server -- The Operations Manager management server cannot 
be installed on a computer on which the Operations Manager agent, Operations Manager gateway, System Center Essentials, 
or System Center Service Manager is already installed. These must be uninstalled to proceed.
----------------------------------

Non of these applications were present on the Management Server, So, After returning serveral times to the snapshot; 
I was monitoring the registy, the following entry was made during installation;

HKEY_CLASSES_ROOT\Installer\UpgradeCodes\C96403E8AD6025B4F9E1FE9C574E34AE

This entry didn't exists before the upgrade!! as seen in this tread [http://social.technet.microsoft.com/Forums/en-US/07675a55-d3e1-4b30-a25c-e85a846b9d00/omservermsi-returns-error-1603-when-trying-to-upgrade-first-management-server-from-operations?forum=operationsmanagerdeployment ]

Also within "Add or Remove Programs" the "Operations Manager Agent" was present.
After manual removing the "Operations Manager Agent" during the upgrade, the installation of OMServer.msi succesfully was continued and the upgrade could continue.

My question is; What the deuce happend here?

Kind Regards,

Maurice Kok

Verify that you install server prerequisites Both .NET Framework 3.5 Service Pack 1 (SP1) and .NET Framework 4 are required.

Also you can refer below link

http://scug.be/christopher/2013/01/24/scom-2012-sp1-omserver-msi-returned-error-1603/

If you read the question correctly, you will see it's not an issue regarding prerequistes.

Old thread but Mai Ali's answer is correct. Pre-requisites will pass even if you don't have .NET Framework 3.5 installed. Make sure you got both 3.5 and 4.0 / 4.5.

Per - https://technet.microsoft.com/en-us/library/JJ656654.aspx#BKMK_Software

for 2012 Sp1

Requirements by Feature

Management Server

• Disk space: %SYSTEMDRIVE% requires at least 1024 MB free hard disk space.

• Server Operating System: must be Windows Server 2008 R2 SP1, Windows Server 2012, or Windows Server 2012 R2.

• Processor Architecture: must be x64.

• Windows PowerShell version: Windows PowerShell version 2.0, or Windows PowerShell version 3.0.

• Windows Remote Management: Windows Remote Management must be enabled for the management server.

• .NET Framework 4 is required. For more information, see the following document:

  • .NET Framework 4 redistributable package

For SCOM 2012 R2

Per - https://technet.microsoft.com/en-us/library/Dn249696.aspx

Operating systems

Operations
Manager server features require a supported operating system. For a
list of the supported operating systems for each server feature, see Server Operating Systems in System Center 2012 R2.

Installing System Center 2012 R2 Operations Manager on Windows Server 2012 Core requires:

• Windows 32-bit on Windows 64-bit (WoW64) support, .NET 4.5, Windows PowerShell 3.0

• In addition, you need AuthManager. To install AuthManager for Windows 2012, add Server-Gui-Mgmt-Intra
  (the Minimal Server Interface.) To install for Windows 2012 R2, install
  AuthManager with this command: dism /online /enable-feature
  /featurename:AuthManager

• If you attempt to install
  Operations Manager without WoW64 support installed, youll see an error
  message telling you that the side-by-side configuration is wrong.