FRDL has a 'hidden' window pane between the status bar and the
altitude profile pane which may be expanded by
dragging it upwards with your mouse.
This pane displays what FRDL has been doing as well as
displaying any errors it encountered.
If you encounter a repeatable error, please get in touch
with the developer with a description of how and when it
occurs and he will endeavour to create a fix as soon
as possible.