3833244 - Prepare step fails without error for Migration Cockpit object “Purchase order (only open PO)” in Migrate Your Data app – SAP S/4HANA Cloud Public Edition

• In the Migrate Your Data (Migration Cockpit – Staging Tables) app, the migration object “Purchase order (only open PO)” fails at the Prepare step without any error being displayed or logged.
• In some cases, the message “Error when checking custom fields for migration object” appears during Prepare/Simulate.

• Product: SAP S/4HANA Cloud Public Edition
• SAP S/4HANA Migration Object Modeler
• Migration Cockpit – Migrate Your Data (Staging Tables)

1. Open the Migrate Your Data (Migration Cockpit – Staging Tables) app.
2. Open an existing migration project.
3. Select the object “Purchase order (only open PO)”.
4. Start the Prepare step.
5. Observe that the Prepare step fails without any error message.
6. Review the monitoring log for the object.

A side effect of a previous correction introduced an inconsistency in the “Check for Custom Fields” logic for the migration object, causing Prepare/Simulate to fail without surfacing an error in the app.

1. Run the report CNV_NOTE_ANALYZER_MC_EXT and select “Migration Approach: Migrate Data Using Staging Tables”; apply all listed fixes across the system landscape.
2. Implement SAP Note 3830128 to correct issues in custom field determination (DDIC synchronization exception).
3. Implement SAP Note 3830864 to correct conversion inconsistency during “Check for Custom Fields”.

• Refer to: How to implement the latest corrections released for Migration cockpit - Staging Tables (3711474)
• Refer to: DDIC synchronization exception caused by invalid custom field determination (3830128)
• Refer to: Adjust Conversion Inconsistency During Check for Custom Fields (3830864)
• Refer to: Migration Cockpit not visible in the Fiori Launchpad (3449838)
• Refer to: Checklist and information required prior to opening a case (3704195)

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