The following severities are used in SNA Server:
| 6 | Detailed problem analysis data |
| 8 | General information messages |
| 10 | Significant system events |
| 12 | Warnings/recoverable errors |
| 16 | Fatal errors |
All logs are placed in the Microsoft® Windows NT® or Microsoft® Windows® 95 Application event log. The default level of event logs can be specified when configuring SNA Server, so that all or some of the event logs can be suppressed; in addition, the system administrator can change the event log level for a particular component using the Manage program or can filter out lower-level messages when viewing log files using the Browse program.
Note that level 16 errors are always taken to be fatal errors; an application that logs a level 16 error will be terminated automatically. In particular, the call to the logging routine will not return; the application should perform all required clean-up processing, including any lower-level logs, before logging the fatal error.