Below are the steps on how to configure the BT BACnet Stack (BBS) logging for troubleshooting purposes.
Navigate to the “system” folder of the BBS Lib. The path to is something like this but with your version: C:\Program Files (x86)\FIN Framework\FIN Framework 5.1.4.142\lib\java\ext\BBS_LIB\system
Copy the path to the “system” folder.
Open Windows Notepad or some other note editor program.
Select the “bbs_base.conf” file and drag and drop on the Notepad to view and edit it.
On the 12th line that starts with LogFile, replace “NONE” with what was copied. Then append BBS_LOG_FILE_Default.txt after it. Make sure to add double backslashes. Should look something like this screenshot, but with your path.
Once done, save the file.
Start FIN and now the BBS_LOG_FILE_Default.txt file should exist in that location and start logging information for troubleshooting.