Upgrade to SAP S/4HANA 1909 - Lessons Learned

[shaji_narayanan]

 

In late 2019, we performed an upgrade of S/4HANA from 1809 to 1909 for a major international CPG client.

Here is a quick post to capture the Lessons Learned from technical perspective.

#	Lessons Learned	When to Act?	Comments
1	Ensure to check compatibility of installed add-ons.	Before upgrade	Refer SAP OSS note 2214409. Some of the add-ons installed were not compatible with 1909 and we had to remove them.
2	Ensure to review and act on unused ABAP objects	Before upgrade	Review and Remove temporary tables. Remove or activate inactive objects. Delete $TMP objects which are not in use or inactivated.
3	Refresh SAPUI5 Extended apps manifest.json files.	Before (& after)	Refer SAP online help. Copy the "sap.ui5" and "sap.fiori" sections of the original manifest.json to the manifest.json of your new extended project.
4	Ensure to perform  BASIS activities	Before upgrade	Clean-up data extractor queues. Remove old update entries (t-code SM13). Deactivate SLT replication during the upgrade window.
5	Avoid error on "objects found without delivery transport".	During upgrade	Refer SAP OSS note 2408272 for resolution steps.
6	Prevent Product Hierarchy data loss.	During upgrade	Refer SAP notes 927249 and 664860 for resolution steps.

Of course, this post is not a one-stop place for 1909 upgrade.

You still need to go through the standard documents and usual activities.

The main ones are:

• The S/4HANA 1909 Upgrade Guide itself.


• Use Simplification Item Catalog to identify, review and compare 1909 functionalities with respect to your current version.


• Use Maintenance Planner to generate the stack configuration file and download patches.


• 1909 Release Information Note 2769531.


• 1909 Release Restriction Note 2799003.


• S/4HANA compatible add-ons Note 2214409.


• 1909 compatible Partner Products Note 2834099.

Wish you all the very best for your S/4HANA and 1909 journey!