Black Frames

[dude]

Uups,

i used one build from the beginning of the year on my mkiii with 113.
Now it was time to extract the mlv to dng, and every 1-2 seconds there are 1-3 black frames, in rawviewer, with mlv2cdng, rawconverter and so on.
When i watch the files on cam, they are fine.
Do you have any ideas?