Solution : https://service.sap.com/sap/support/notes/93503 (SAP Service marketplace login required)
Key words : 
menu options 'system -> utilities -> sql trace', 'system -> utilities -> sql trace', permanently stored access data, r3<sid><pkgkind> library, r3<sid><pkgkind>/<pkgname>, find extremely varying information, type check prepared statement, generated spool file <pkgname>, r3<sid><pkgkind>, check sql packages
Related Notes : 
       
| 149553 | AS/400: Error MCH2804 in DLTR3PKG | 
| 63037 | AS/400: Deleting SQL Packages |