Solution : https://service.sap.com/sap/support/notes/174969 (SAP Service marketplace login required)
Key words :
-> rules-based availability check -> condition technique, rules-based atp check, create meaningful field labels, avoid long field names, purely numeric material numbers, testmat 0000000000000000000000000000000000000111the rule determination, manipulating existing field values, valid condition records, implementing user exits, affect existing datasets
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| 376773 | UserExit EXIT_/SAPAPO/SAPLBOP_FILT_010 |