Solution : https://service.sap.com/sap/support/notes/546052 (SAP Service marketplace login required)
Key words :
dialog box screen saplspo1 300, batch input processings, 'batch input data, error message 00344 occurs, mass change posts, batch input processing, message record exists, processed message record, dialog box depends, status nast-vstat = '0'
Related Notes :
| 545754 | Change MEMASSPO from batch input to BAPI |
| 505585 | MEMASSPO: ABAP runtime error TIME_OUT |
| 421744 | MEMASSPO: EKKO-ABSGR cannot be changed |
| 69382 | Batch input of POs: EM 00344 with screen SAPLSPO1 300 |