Message Number list used by SAP ABAP Program LNNL4F90 (Include programm with database accesses.)
SAP ABAP Program LNNL4F90 (Include programm with database accesses.) is using
# Object Type Object Name Object Description Note
     
1 Message Number  NN - 521 No diagnosis: Case no. & and diagnosis no. &
2 Message Number  NN - 557 Cannot find window & for form &