SAP Software Change Registration (SSCR) is s procedure of registering manual changes of SAP dictionary and source code. It includes the object registration (object key), developer registration (so called developer key). If developer (must have developer key in table DEVACCESS, this key is entered only once) wants to modify objects in the SAP system it prompts for these keys (object key for SAP source code or dictionary object, keys are stored in table ADIRACCESS). These keys are normally requested via SAP Support Portal at a link support.sap.com/en/my-support/keys.html.
However, within introduction S/4 (starting with version S/4HANA 1511,
BW/4 systems including as well)
based system the SSCR procedure has changed. Whether the particular system
requires the SSCR keys can be controlled by system profile parameter system/usage_flavor. If it is set to value SIMPLE the registration is off.
On other hand if it is set to value, STANDARD
the registration is on. Notice that the parameter can only be set during system
installation phase. Technically, how the developers are controlled (in case the
standard registration is off) is that the developer has to have a role assigned
that contains authorization objects S_TRANSPRT and S_DEVELOP.
I consider this as an activity that is a part of simplification
of SAP systems. Complete “key registration” thing was just an unnecessary
burden (think of registering a new ABAP developers, someone who has an access
to SAP Support portal needed to do
the registration) for SAP customers. That is why to me it is nice
to see it’s gone. Yet there are other possibilities how to control the
developments. Think of defining changeability of SAP system in t-code SE06, define
client specific behavior for development in t-code SCC4. See more info regarding
those options here: System
change option for SAP BW systems.
More info:
2501703 - Frequently asked
questions about SAP Software Change Registration (SSCR)
2309060 - The SSCR license key
procedure is not supported in SAP S/4 HANA
SSCR registration on SAP ONE Support Launchpad
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