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Upgrade to SAP S/4HANA 1909 – Lessons Learned

 

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:

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

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