What’s the directory of the log file?

From version 1.475 log files are located in
"Users\<USERNAME>\Application Data\Cantracer"
directory. The file named CanTracer_<currentdatetime>.log.

Old versions of the program log file «CanTracer.log»  is located in the root directory of the installed program (by default in «C:\Program Files (x86)\CAN Tracer»). If the log file has not been created, run the program with Administrator rights.