Solution : https://service.sap.com/sap/support/notes/121857 (SAP Service marketplace login required)
Key words :
additional key words ggb1, incomplete source code, 'generate substn exp, execute program rgugbr00, execute program sapfaccg, attached advance correction, select 'generate substitutions', advance correction, program error, field contents
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| 105534 | Coll.note:Trace/simulation of validation/substitutn |
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| 19861 | Validations, substitutions yield unexpected results |