Studer OnAir 3000 Operating Instructions Manual page 342

OnAir Digital Mixing Consoles
To help identifying the cascade, a software warning is written into the log file
of a running Logger, as shown below.
If a Source is configured that creates a feedback, the following user warning
is displayed:
User Warning 8806: CUSTOM LOGICS, Feedback
detected at Gate 'AND 1'. Source cleared.
To help identifying the feedback loop, a software warning is written into the
log file of a running Logger, as shown below.
Configuration 6-101
Document generated: 10.10.14 SW V6.0