Step by step on changing ecc source systems without affecting data modeling objects in sap bw

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© 2009 SAP AG 1
Step by Step on Changing ECC
Source Systems without Affecting
Data Modeling Objects in SAP BW
Applies to:
SAP ECC 6.00 and SAP BW 7.0 releases. For more information, visit the Business Intelligence homepage.
Summary
This paper gives a detail understanding of the steps to follow for changing ECC source systems on SAP BW
environment without impacting the Data modeling objects built in the SAP BW system.
Author: Vamsi Sirish Siddabattuni
Company: Deloitte Consulting LLP
Created on: 28 November 2009
Author Bio
Vamsi Sirish Siddabattuni is an SAP Certified Netweaver 2004s BI Solution Consultant and SAP
Certified ABAP Workbench consultant. He has more than 6 yrs of experience working on SAP
BW projects and has implemented SAP BW systems based on SAP BW 3.0b, 3.5 and 7.0
versions.

Step by Step on Changing ECC Source Systems without Affecting Data Modeling Objects in SAP BW
© 2009 SAP AG 2
Table of Contents
Introduction .........................................................................................................................................................3
Scenario ..........................................................................................................................................................3
Step By Step Procedure .....................................................................................................................................4
Step 1:.............................................................................................................................................................4
Step 2 :............................................................................................................................................................6
Step 3:.............................................................................................................................................................6
Step 4:.............................................................................................................................................................9
Step 5:...........................................................................................................................................................10
Step 6:...........................................................................................................................................................12
Step 7:...........................................................................................................................................................14
Related Content................................................................................................................................................15
Disclaimer and Liability Notice..........................................................................................................................16

© 2009 SAP AG 3
Introduction
In SAP BW Implementation Projects we might encounter certain scenarios where SAP BW systems may
need to connect to different ECC Source Systems during the Integration Testing phase of the project without
affecting the data modeling objects in the BW environment. This document is a step by step procedure for
switching source systems.
Scenario
The scenario discusses about switching ECC source systems in SAP BW Environment without affecting the
data modeling objects in the BW environment. By data modeling objects, we mean transformations, update
rules and transfer rules getting inactive or getting deleted. Once the source system is switched, data reload
needs to happen to have the initializations and deltas to come from the new source system. Also we have to
ensure that the data from old source system( both transactional and master ) needs to be deleted in the BW
system before reloading from the data from new source system to ensure consistency in the data from new
system.

© 2009 SAP AG 4
Step By Step Procedure
The environments discussed in the current context are BW system ( BWQ Client 200 ) and ECC systems (
ECQ Client 180 and ECQ Client 170 ). We will discuss the scenario of switching ECC source system ECQ
Client 180 to ECQ Client 170 on BWQ Client 200 System.
Step 1:
In Transaction BDLS on BW system logical names of the source system need to be changed.
In the ‘Old Logical System Name’ field, enter the existing source system ‘ECQCLNT180’ and in the ‘New
Logical System Name’ field enter the new source system that we want to change to which is ‘ECQCLNT170’.
Execute the run for this transaction in background to change the source systems.

© 2009 SAP AG 5
The above step would change the source system name in the BW system. We now need to setup the
connection for the new source system.
You can now see that the Technical Name of the source system got changed from ECQCLNT180 to
ECQCLNT170.

© 2009 SAP AG 6
Step 2 :
In the next step, we need to open the BW system for change access by going to the transaction SCC4.
Select the option ‘Changes to Repository and cross-client Customizing allowed’ option for ‘Cross-Client
Object Changes’ and click on save button to save the changes.
Step 3:
In the next step on the BW environment, go to Transaction SE37 and select the function module
RSAP_BIW_DISCONNECT and execute.

© 2009 SAP AG 7
Provide the following following entries as inputs for the function module.
RFC target sys -> Name of the RFC which the old source system used.
I_BIW_LOGSYS -> Logical name of the BW Client. ( BWQCLNT200)
I_OLTP_LOGSYS -> Logical name of the old ECC Client. ( ECQCLNT180)
I_FORCE_DELETE -> X.
The following step would delete the entries needed for the source system change in the table RSBASIDOC.

© 2009 SAP AG 8
Also we need to execute the same function module in old ECC source system with the same inputs to delete
the entries needed for the source system change. In this context we are executing the function module in
ECC source system Client 180. Ensure that the table entries for the BW system are deleted in Table
RSBASIDOC.

© 2009 SAP AG 9
Step 4:
In the next step, open the client for changes using transaction SCC4 in the new source system which is
ECQ Client 170 using the same procedure described for BW environment above.
Change the RFC connections from Client 180 to 170. You can do so in transaction SM59.

© 2009 SAP AG 10
Step 5:
In the next step, in the BW environment go to RSA1 to restore the connection for ECQCLNT170 system.
Enter ALEREMOTE username and password for this procedure.

© 2009 SAP AG 12
Step 6:
In the next step do the check and use connections. After that replicate the source system objects.
This job can be executed in the background if it has to replicate lot of data sources.

© 2009 SAP AG 13
Check to see if the partner profiles are active in WE20 transaction if you face any error during the replication
Process.

© 2009 SAP AG 14
Step 7:
In the next step select ‘Yes’ for reactivating all transfer structures and data sources.
With this step the source system switch is finished. Close the BW system and new ECC source system for
any changes by using the transaction SCC4 as described in the previous steps.
Do a final check of the source system by right click on source system and select option ‘Check’ to see if the
source system is correctly mapped. After this you can start loading the data from the new source system. But
remember to delete all the data from the BW system concerning the old ECC source system otherwise you
might see inconsistent data in the new BW system.

© 2009 SAP AG 15
Related Content
Datawarehouse Management
http://help.sap.com/saphelp_nw04s/helpdata/en/e3/e60138fede083de10000009b38f8cf/frameset.htm
For more information, visit the Business Intelligence homepage.

© 2009 SAP AG 16
Disclaimer and Liability Notice
This document may discuss sample coding or other information that does not include SAP official interfaces and therefore is not
supported by SAP. Changes made based on this information are not supported and can be overwritten during an upgrade.
SAP will not be held liable for any damages caused by using or misusing the information, code or methods suggested in this document,
and anyone using these methods does so at his/her own risk.
SAP offers no guarantees and assumes no responsibility or liability of any type with respect to the content of this technical article or
code sample, including any liability resulting from incompatibility between the content within this document and the materials and
services offered by SAP. You agree that you will not hold, or seek to hold, SAP responsible or liable with respect to the content of this
document.

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