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Upgrade to S/4 1709 FP01 – Lessons learned

Ok, actually upgrading S/4 System is not really my turf. However getting the latest NetWeaver 7.52 Version and S/4 1709 is also interesting together for the usage with BW/4HANA.

So my Source System is based on S/4 1610 FP02 IDES and it used also from the SAP Mentors as a Test System. Due to the fact that the System is hosted in the Azure Cloud, it is possible to work simultaneously together with our external colleagues and internally.

Good to know:
Even that I used the option “Single System” as the main Upgrade strategy, you have to deal with a Shadow Instance and several activation processes

the following sources were used from support.sap.com/sltoolsetSUM 2.0 SP02 from 29.01.2018

Note 2532587 – Add. info. on converting to SAP S/4HANA using SUM 2.0 SP01
Note 2594074 – Add. info. on converting to SAP S/4HANA using SUM 2.0 SP02

Important SUM Phases


Plan the target Vector in the Maintenance Planer

As the source System contains several Add-On, the MP has to calculate a lot of dependences which might not work from the beginning.


Prepare the S/4 readiness Check

The S/4 readiness check is the essential check before the technical Upgrade starts and will be called as Report /SDF/RC_START_CHECK

Note 2495992 – SAP S/4HANA 1709 – application specific notes in system conversion / upgrade preparation phase
Note 2471149 – SI Check 1709: Reconstruction of indirect relationships in table VBFA needed. Upgrade not possible
Note 2418242 – SD – Issue in Document Flow (SAP S/4HANA): Correction

Report SD_VBFA_RECONSTRUCTION

Note 2210486 – S/4HANA Business Partner Conversion Reports
Note 2245333 – Pre-Transition Checks for FIN: Error Messages and Possible Solutions

Note 2389794 – SAP S/4HANA 1610 – application specific notes in system conversion preparation phase
Note 2399707 – SAP Readiness Check – Simplification Item Check
Note 2502552 – S4TC – S4/HANA Conversion & Upgrade new Simplification Item Checks
Note 2538018 – S4TC – S/4HANA 1709 Conversion & Upgrade – TCI Note #3

Important:
make sure you implemented the latest Version of the Notes 2399707 (at least Version 82) and 2502552 (at least Version 31) as you cannot update them during the relevant SUM phases anymore.

Report /SDF/RC_START_CHECK

Here the Target SAP S/4HANA Version 1709 [01(01/2018) FP] must be selected, otherwise the SUM process cannot calculate the target System in the Phase

PREP_EXTENSION/RUN_S4H_SIF_CHECK_INIT

Background Job /SDF/RC_START_CHECK Failed

SUM-Phase: PREP_EXTENSION/RUN_S4H_SIF_CHECK_INIT

Errors occurred during Execution of S4Hana Readiness Checks to verify if upgrade is possible. For more information, see log file S4_SIF_TRANSITION_CHECKS.S4H.

Log file error summary:
File S4_SIF_TRANSITION_CHECKS.S4H does not exist in directory /usr/sap/<SID>/SUM/abap/log (it will be written once the Phase is successful)

Error Message:

Target product version and stack cannot be read from stack.xml
Check execution has been stopped because prerequisites of consistency check in SUM mode have not been met.
Job finished


Important:
SUM Phase:
MAIN_SHDRUN/SUBMOD_PARDIST_CDS/RUN_DIST_ADD_DDLS_FOR_CONV_TABS

If you encounter Problems with the following DDLS objects, then make sure you checked the Nametab’s before the Upgrade starts for consistency.

ZV_DEMO_01
ZCVHADOOPCDS
ZFVHADOOPCDS
ZZ1_D40EA67C16EB

 

 

 

 

 


SUM-Phase:MAIN_SHDIMP/RUN_S4H_SIF_CHECK_EXEC



SUM Phase:
MAIN_SHDIMP/SUBMOD_SHD2_RUN/SUBMOD_GEN_ABAP_LOAD/RUN_SGEN_GENER8

You have decided in phase PREP_CONFIGURATION/INITSUBST to do the SGEN on shadow instance which turns out not to be the best idea (actually a very bad Idea) …

 

Solution:
use the solution from the following
Note 2475935 – How to skip phase RUN_SGEN_GENER8 on shadow instance

select count(GENSTATUS) from "SAPS4H"."UPGGENSET~" where genstatus = 'I';
truncate table "SAPS4H"."UPGGENSET~";

 


Final Steps in the S/4 Upgrade

see the log file /usr/sap/S4H/SUM/abap/log/LONGPOST.LOG

 

You can run SPAU now and remove old and obsolete Add-On’s if possible …

 

 


Good to know:
The S/4 Readiness Check /SDF/RC_START_CHECK will show that Note 2502552 is not implemented, as the purpose of the Check is relevant only for the preparation of an Upgrade or Conversion to SAP S/4HANA 1709 and above.
As soon, as the Upgrade or Conversion to SAP S/4HANA 1809 is available, the Note 2502552 will be relevant again.

Have fun … and always stay curious 🙂


So what to do next?

Check the following Blog’s from Jörg Knaus about the usage of the new Migration tools

Blog – Getting started with the S/4Hana Migration Cockpit (OnPremise)
Blog – Discover the S/4HANA Migration Cockpit Migration Object Modeler (OnPremise) /NLTMOM

 


Roland Kramer, PM EDW (BW/HANA/IQ), SAP SE
@RolandKramer

 

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