Solution : https://service.sap.com/sap/support/notes/359256 (SAP Service marketplace login required)
Key words : 
error batch input folder depending, additional key words co257, program reacts differently, error folder, program error, program ppbico40, implement note 320653, source code, background processing, background
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| 502383 | APO->R/3: Dialog box with planned order conversion | 
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