OK, thanks. As a temporary workaround, you might be able to specify all the options on the command line instead of referencing through the configuration. I will work on adding some more debug logging to figure out what’s happening here. If you send me an e-mail I’ll let you know when the new build is ready.
Thank you for looking into it. A bit more info: using the GUI and watching the activity window shows that the error occurs at the “Applying layout” stage.
Do you mean that you initiated the operation via the GUI, e.g. drag and drop? Either way, an error at that stage makes it sound like the error is not related to using the command-line tool. There may be more error information in the Detail drawer for the main window. You can also click this link to enable some additional debug logging for the layout.
I did not hear back from the customer, so I’m assuming that the problem no longer occurs. The improved error reporting was incorporated into DropDMG 3.3.