S4 HANA 2021 MD migration story...
Try to run that you think, should be Migration Cockpit, having those part of URL:your part
sap/bc/webdynpro/sap/dmc_wda?WDCONFIGURATIONID=DMC_WDA_APP&sap-client=999&sap-language=EN#
Brings some errors:
It is no longer possible to migrate data using transaction LTMC. It is still possible to display existing projects, but new projects cannot be created.
You can use the app Migrate Your Data – Migration Cockpit to migrate data to SAP S/4HANA. You can access this app in the Fiori launchpad.
Migrate Your Data app works with ala-Excel tables but of course, not everything is so simple...
The app can only work if settings in SCC4 and SE06 configured according SAP note
3104790 - Modifiable Systems and Transport Concept, SAP S/4HANA Migration Cockpit - Migrate Data Using Staging Tables
3039598 - SAP S/4HANA Migration Cockpit Fiori App - Cannot Create Project
And some bonus from me - below you can find pictures about the topic:
Migrate Your Data app have button "Create". Having those mode, you can't create new objects inside created project, you can only change (upload) existing objects.
SCC4
- The software component assigned to the development package is set to Modifiable. (MARA table, for example)
- The namespace assigned to the development package is set to Modifiable
You also can export / import migration project via file using program /LTB/MC_PROJ_Q2P.