The following warning message appears when initializing the Debugger:
"Program has not been compiled with debug information"
From Session menu on the main menu toolbar select "Include Debug Info".
Refer to the below solution for more information on how to debug in SQL Navigator:
Per the developers:
This work flow has been improved in SQL Navigator 6.2. In 6.1, if the object has not been compiled with debug information, there is only a prompt to notice the user and the user will have to find the "Include Debug Info" button themselves. In 6.2, instead of just a notice that the object has not been compiled with debug information, it will also give the user the option to compile with debug information, so it's more intuitive.