Earlier today I successfully used Photomatix HDR for two photos, the next one gave me the black screen with “Unsupported Image Format” as  result.  I’m using Aperture 3.5.1, Photomatix Aperture plug-in 2.1.2, OS X 10.9, Digital Camera RAW 5.01 Build 718.1 and Digital Camera RAW Support 5010 Build 91.8.  The camera used for each of the photos was a Canon EOS 6D.  How can I stop this result from happening?