Solution : https://service.sap.com/sap/support/notes/501571 (SAP Service marketplace login required)
Key words : 
parameter type reference type default, type proposal optionaltco11_imp tco11as, production resource/tool availability, material availability check reason, valuetco11_imp type tco11, import parameter ref, function group cota, short text 'storage, function modules co_ta_tco11_read, function module co_ta_tco11_set
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| 521553 | Reduction of data control blocks part 6 | 
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