How to log BIAR export/import from command line

Hello

Can anyone please tell me how to log the actions during the import (or export) of a BIAR file when it is executed from the command line

OR

If this type of logging is enabled by default then can anyone tell me where the log files would typically be found

Best regards and thank you

Patrick

C:\Program Files\Business Objects\common\4.0\java\lib>

java -jar biarengine.jar MyCMSImport.properties