You may receive the following error when attempting to save a Discovery file in Discovery and Risk Assessment Server 2013:
Error saving Discovery settings. Empty path name is not legal.
The error may occur when you click "Discover" in the Discovery window:
When starting a Discovery, you are prompted with the following dialog box:
If you click on Yes, you see the error instead of getting a dialog box to allow you to save your changes. This can happen if you do not have a Discovery file configured in the Discovery settings.
To resolve the error, go to File > Save As and save the Discovery configuration as a .dis file before running or closing the Discovery configuration window. Then go to File > Configuration in the main Discovery menu and select the .dis file in the Discovery File text box:
You will need to restart Discovery for the change to take effect.