Here we would like to draw your attention to SA18 transaction code in SAP. As we know it is being used in the SAP BC-SRV (Basis Services / Communication Interfaces in Basis) component which is coming under BC module (BASIS).SA18 is a transaction code used for Reasons for Nondelivery (BAS) in SAP.
It comes under the package SZAD.
Transaction SA18 technical data table
| Tcode | SA18 |
| Purpose | Reasons for Nondelivery (BAS) |
| Module | BC |
| Component | BC-SRV |
| SAP Package | SZAD |
| Type | P |