Must you have coordinates (as opposed to address) to Get Directions on Google Maps?
Map Settings - "When marker clicked..." dialog
When changed from Default to Get Directions I get the error For input string: "-1#"
I get this when clicking the Edit or View record operations from a query; don't get to the form at all.
Seems to be a java error (googled)
btw - I can't just change it back to Default. Have to delete the form cell and build it anew.