By default, SLIC will produce begin and end error messages like this.

>>>> BeginEvent <1>
>>>> EndEvent <1>

To turn off these messages, the following two lines should be added to your SLIC macro.

/log/PrimaryGenerationAction/setLogLevel 0
/log/EventAction/setLogLevel 0

The first command turns off "BeginEvent" and the second disables the "EndEvent".