Solution : https://service.sap.com/sap/support/notes/505585 (SAP Service marketplace login required)
Key words :
purchase orders mass maintenance terminates, object key ekpo-ebeln, condition nast-kappl = 'ef', abap runtime error time_out, table nast terminates, mass maintenance examines, attached advance correction, mass maintenance, long runtime, program error
Related Notes :
| 546052 | MEMASSPO: 00 344 BI data for screen SAPLSPO1 300 is missing |