A new feature was introduced in SONAR 8.3 that presents a dialog box when a bus has no output or would be silent.  This dialog can be disabled by a variable introduced in the Cakewalk.ini file.  The variable, WarnSilentBuses goes in the [WinCake] section and has a default setting of "1" (On).  Changing this to "0" will disable the silent bus warning dialog.

To change the variable:

1. Click Options | Initialization File
2. In the Option field type: WarnSilentBuses
3. In the Value field type either "1" or "0" for the desired behavior
4. Click Set and then Close