The SUP server was unable to establish a connection with the EIS.
| Domain | SUP Server EIS Exception |
| Number | 503 |
| Label | EIS_DOWN |
| Applicable Platform(s) | iOS, Android, BlackBerry, Windows Mobile |
There are a large number of potential causes for this error, but it is typically an indication that the EIS is either no longer running, or cannot be reached by the SAP Mobile Platform server.
Restart the enterprise information system (EIS). Also check the server trace logs to determine the specific cause of the problem; you may need to increase the tracing level to do this.