Solution : https://service.sap.com/sap/support/notes/134287 (SAP Service marketplace login required)
Key words :
error message 'abap/4 runtime error time_out', additional key words purchasing statistics, purchase order history records, large purchasing documents, purchase order date, program termination occurs, thousand schedule lines, average price results, individual partial irs, purchasing statistics
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383596 | LIS| Different IR amount when setting up at posting date |
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94719 | |
89318 | Purchasing stats - GR for several purchase orders |
65597 | Purchasing statistics - IR, GR distribution |