Solution : https://service.sap.com/sap/support/notes/381720 (SAP Service marketplace login required)
Key words : 
created additional gross wage types, mismatched user wage types determined, 99991231t512w      00007/1h 99991231t512t      000e07/ih t512t      000e07/, user wage types subject, process user wage types, adjust user wage types, test option de-activated, year 2001 payroll cluster results, wage types determined, user wage types
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