I suggest you to check first if in the DRACULA rul file you set INQUERY = YES
this will allow you to use DRACULA INTERACTIVE to check the errors.
More, you need to select the correct output file.
I don't recommend to use dracula2diva convertor, because these two tools, even are made by Cadence, are not 100% equivalent. You will descover a lot of things that are ommited because of this convertor.
More again, DIVA is a low quality checker. Take a lot of memory, sometime freeze your screen for hours, and the diva rules let you to have TAPE or BULK or SUBSTRATE (choose one) errors without inform you.
More again and again, if you have some path metals draw on 45 degree you have off grid issue, and diva didn't show you.
Last More.....because of that offgrid, you can have power shorts.....and I suppose that you know what this mean.
I strongly reccomand you to use DRACULA if you haven't something better. Forget about DIVA.
Enjoy!