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Step by Step Procedure for Kernel Up-gradation in Windows Environment


This document describes procedure for Kernel Up gradation for a SAP system in windows platform.

Step by Step Procedure for Kernel Up-gradation:

  1. Basis Administrator shall login to with OSS & password and download the latest Kernel files.
      • Downloads—->SAP Support Packages—->Support packages & Patches-Entry By application group—->SAP application Components—->SAP ERP—->SAP ERP 6.0—->  Entry By Component—->SAP ECC Server—-> SAP KERNEL 7.20 EXT 64-BIT UC—->Windows Server on X64 64BIT—->MaxDB “SAPEXEDB_402-20006745.SAR”    (Kernel Part II)

      • Downloads—->SAP Support Package—->Support packages & Patches-Entry By application group—->SAP application Components—->SAP ERP—->SAP ERP 6.0—->Entry By Component—->SAP ECC Server—->SAP SAP KERNEL 7.20 EXT 64-BIT UC—->Windows Server on X64 64BIT—->#Database  Independent “SAPEXE_402-20006748.SAR” (Kernel Part I).                                                                                                         

   2.     Login to the Server through OS level with SIDadm.

   3.     Make the copies of the existing folders  in the backup folder :- 

      • Drive:\usr\sap\SID\SYS\exe

   4.     Stop the SAP Instance & Services

      • SAPSID_00
      • SAPSID_01
      • SAPHostControl
      • SAPHostExec

   5.     Extract the SAR Files  

      • Go to command prompt
      • Go to as above path & Extract the files

      c:\sapcar –xvf *.sar

  6.    Copy and paste the uncared files to \usr\sap\SID\SYS\exe\uc\NTAMD64\ .

  7.    Select the option copy and Replace if it prompts pop message as “There is already a file with same name in the location.”

  8.    Start the services and Instances

   9.      Check the updated kernel from Command Prompt  by giving disp+work.

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  • What happens when SAP is installed in a cluster ...?, There are 3 usr folders on each node and the cluster disk (central instance). which are replaced ...?

    • Hello Christian,


      You should replace the kernel at the "\sapmnt\SID\exe" folder only.


      The new kernel will be copied to the exe folder of each individual instance when SAP is started (if the instances were installed per the SAP Installation Guide + SAP Installation tools).


      As a side note, all instances of an SAP system must be using the same kernel .




  • if we paste the new downloaded kernel files in DVEBMGS<instance no> & we do not paste in \usr\sap\SID\SYS\exe also it does not matter because when we start the SAP system, then it automatically adapts to the new kernel that is already pasted in DVEBMGS__\exe because when it starts reading the total system kernel it finds the newer kernel files & adopt accordingly

  • Hello Gurus,

    great guide, thanks Sudhakar.

    I have one quick question, though. Is there any different betoween the path you are giving versus this path?
    Support Packages & Patches - By Alphabetical Index (A-Z) - K - SAP KERNEL 64-BIT UNICODE - SAP KERNEL 7.21 EXT 64-BIT UC

    I see same components and easier/faster to get to the desired/needed Kernel.

    Your comments will be appreciated.

    Kind regards,


    • Hi Alfonso, there is no difference between the mentioned link and the old link, the old link items only migrated to here.




      Sap bass Support