System Requirements

Unicode

As a prerequisite for the conversion, your system needs to be a Unicode system. If your system is still non-Unicode, you can follow a two-step conversion approach: First, perform a combined upgrade and Unicode conversion with one of the supported start releases as target, then perform the conversion to SAP S/4HANA foundation.

For additional information, see Unicode Conversion Overview Information published on SAP site (on SAP SCN).

Application Server ABAP Only

Your system has to be an AS ABAP only system. Dual stack systems (AS ABAP and AS Java combined in one system) are not supported for the conversion. If your system is a dual-stack system, you have to split it before doing the conversion.

For additional information on how to perform a dual-stack split, see:

SAP Note 1655335
Guide at https://support.sap.com/sltoolsetSystem Provisioning System Provisioning Scenarios Split a System using Software Provisioning Manager 1.0 Dual Stack Split Guides.
Dual Stack Split