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New SAP cluster resource DLL is available!

In this blog I want to show you, why you should upgrade to the latest NTCLUST.SAR package from SAP which contains a brand, new cluster resource DLL called “saprc.dll”. The new saprc.dll is completely redesigned and doesn’t use any code from the old implementation. Please see SAP note 1596496 http://service.sap.com/sap/support/notes/1596496 for detailed information …

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SAP cross-cluster move with minimized downtime

Many customers are using SAP ABAP or Java application servers installed in a system architecture based on the Windows Server Failover cluster framework. This high availability architecture is well-known and has been proven to work for years. Unplanned hardware failures and maintenance activities can be covered with minimal impact for …

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How to create a high available SAPMNT share?

In a distributed SAP landscape, there must be a central SAPMNT share. This SAPMNT share will be accessed using the parameter SAPGLOBALHOST. On a Windows Failover Cluster installation, SAPGLOBALHOST is identical to the virtual hostname used for the (A)SCS instance. But how should you make this very important sapmnt share …

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How to change a cluster Generic service to SAP service?

This blog describes how to change the cluster Resource Type of a resource “SAP <SID> <NR> Service” from Generic Service to SAP Service on Windows Server 2008. The SAP Service resource is necessary for the RKS – The Rolling Kernel Switch functionality. As of Windows Server 2008 R2, Microsoft provides PowerShell …

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What you can learn from systeminfo.exe?

The tool “systeminfo.exe” has been available since Windows 2003, but only a few Windows admins seem to know it. You can get so much valuable information from it, therefore I write this blog. You don’t need administrative rights to run it, it can be executed in a command-prompt or PowerShell …

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How to repair Windows installer configuration?

Sometimes, you cannot install newer software on Windows, if an older version is already installed and the configuration is somehow damaged. SAP MMC, SAP GUI and other SAP applications install themselves using the MSI installer. You see them if you open Windows Control Panel → Programs → Programs and Features: …

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C-runtimes needed to run SAP executables

On Microsoft Windows, you need so-called “c-runtime” packages to run applications, which were build using certain Visual Studio versions. For example, an application that has been compiled with Visual Studio 2013 will simply not run if the runtime package (vcredist package) is not installed. With this blog I want to …

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Issues with Windows 10 ‘Creators Update’

The Windows 10 so called “Creators Update” from March 2017 caused several problems with rendering Webdynpros. One affected transaction is for example: SOAMANAGER. Affected SAP releases are 7.31, 7.02 with SP 18. Not affected: 7.4x and 7.50. (this list is not complete!) Another problem was reported with transaction “nwbw”, it also didn’t …

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Why you should use ReFs instead of NTFS on Windows?

Starting with Windows Server 2012 Microsoft introduced a new file system called ReFs: Resilent Filesystem. In the beginning, ReFs contained only a subset of functions from the older, well-known and proven NTFS. This changed with Windows Server 2012 R2. Today, it’s the recommended file system you should use for SAP operations. The benefits …

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Where should I place a firewall in my SAP landscape?

Today, each Windows OS is shipped with a build-in, enabled firewall service. SAP systems should be secured by firewalls to prevent DoS attacks, block port snooping, allow or deny access from certain IP addresses or address ranges, to specific SAP applications. This picture shows a proven and secure SAP landscape: Recently we have …

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SAP operations in Failover Cluster

Many customers operate SAP NetWeaver based products in a Windows Failover Cluster and many of You asked for a troubleshooting guide for cluster related problems. This blog lists error messages of SAP’s Windows Failover Cluster DLL (saprc.dll) and gives hints and solutions for known problems of SAP software in Failover …

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SAP with Windows 10 and Office 365 (Office 2016)

Like many organisations we are planning our laptop/desktop estate migration to Windows 10 and Office 2016, SAP is a very key system in our organisation so we gathered the list of SAP products and their supported patch level/service packs. Hopefully this is useful for others…. Office 365/Office 2016 http://service.sap.com/sap/support/notes/722513 = …

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Sideloading on Windows 8 and 8.1

With the release of Windows 8 Microsoft announced a new kind of applications called Metro Apps. Meanwhile is has been renamed to Windows Store Apps but the behavior is still the same. It is just a program which uses the advantages of the New UI (Metro UI), it will integrate …

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Scripting SAPMMC Operations

SAPMMC is a graphical user interface designed for performing administrative operations on SAP instances on Windows. It is based on the Microsoft Management Console, which does not allow any scripting operation. If you wan’t to script operations you are used to perform in SAPMMC you have to choose alternative tools. …

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What is Semaphore? ( SM50, sem)

What is Semaphore? In computer science, particularly in operating systems, a semaphore is  a variable or abstract data type that is used for controlling access,  by multiple processes, to a common resource in a parallel programming or a multi user environment. What do the semaphores mean in SAP? In trace …

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Avoid Certification Selection Popup in Google Chrome

when connecting with Google Chrome to a website which uses a certificate for identification you always get the certificate selection popup: In Microsoft’s Internet Explorer you are able to automatically suppress this popup via Internet Explorer Settings. In Google Chrome you can also suppress the certificate selection popup. Unfortunately, the …

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Remote Desktop Connection Manager

After about SAP server # 17, I began to grow tired of having to track the various host names/IP address/which user I was logging in with for various maintenance functions. I came across a great and FREE solution:  Remote Desktop Connection Manager (download page), not to be confused with the …

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Switching the SAP JVM From JDK

With SAP JVM 4.1, customers can get as long support for their JDK as they get for the remaining SAP NetWeaver 2004 and SAP NetWeaver 7.0 based software from SAP. SAP JVM 4.1 is supported directly by SAP. SAP developed its own Java Virtual Machine (JVM) 1.4.2, named SAP JVM …

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