We seem to ba having an isue with the scanner: I've been succesfule in scanning Cobble, sand, and gravel, but everythign else keeps telling me "!! Error !!" It's getting old actually. I've irritates my fellow workers by killing the house's EU power on a few occasions (MFE fed by 8 geo-gens supplied via the nether.) I've scanned obsidian more then 23 times in a test world and keep getting that message from the scanner.
Is there a list of what it will and will not accept?
Iridium was no issue however.