Solution : https://service.sap.com/sap/support/notes/147706 (SAP Service marketplace login required)
Key words :
system generates message n3259 'selected business partner, repair im ish maintenance level 4, additional key words nl10, ish maintenance level 4, 02a patch level 06, business partner, patch level 05, ish release 4, detail screen, valid function'
Related Notes :
| 119281 | IS-H: Current collective note on important errors in 4.02A |