Accounts receivable of 200 vanished into 100. The most terrifying thing is an ABAP 'successful completion'—Case studies of actual failures in SAP

What is the most terrifying thing in an SAP ABAP program?Is it a short dump? An abnormal termination of a batch process? Or ...
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ABAP (Advanced Business Application Programming)

ABAP (Advanced Business Application Programming) is the primary programming language supported on the SAP NetWeaver ABAP application server platform and applications that run on it, such as SAP ERP ...