Assertions - SchwarzIT/sap-usi-logging-api Wiki
Whenever unexpected things happen, there will be an assertion in the code. All assertions are assigned to the checkpoint group /USI/BAL_LOG_WRITER, so that the behavior of the assertions can controlled via transaction SAAB.
If anything does not work as expected, create a user-specific activation in transaction SAAB to log/debug the issues. The process is described unter: Functional Documentation -> Troubleshooting -> Enter Debug Mode