The Log Variable Values action allows you to log the current values of one or more variables. Logging variable information can be useful when debugging  FinalBuilder projects (see also Watches) or can be used to make log files easier to follow.
Log Variables
Variables To Log
Log All Defined Variables
...
If this checkbox is not selected, variable names which do not exist will be logged as "Variable X is not defined".
See Also
Action Logging Properties also: Action logging properties