I've had a similar thing happen with Lightroom1.0 and DNG Converter  
v3.7 working with PEF files. The files could not be opened, but  
Pentax Lab could and made DNG files that both DNG Converter and  
Lightroom can and do open properly.

Odd stuff.

G

On Mar 8, 2007, at 2:13 PM, John Coyle wrote:

> Strange happenings : yesterday I processed a number of shots in  
> Lightroom
> (v1), exporting the processed images to DNG format from the  
> original JPEGs.
> Later in the day I installed the Tryout version of PS CS2, and  
> opened the
> file browser to do a little detail work on some of them.  Most of  
> the saved
> DNG's were fine, but one small batch of about a dozen were reported  
> as " not
> the correct document format", and would not open.  Reverting to LR,  
> they
> opened without difficulty!
> As far as I could tell, there was absolutely no difference between  
> those
> that would open and those that wouldn't: they were all taken in a  
> space of
> two days, and all were processed in LR at the same time, in the same
> session.
>
> Anyone had similar experiences, or can otherwise shed light on this  
> one?
>
> Unfortunately, I'm away for a day or two so I don't have the  
> opportunity to
> hack the files for differences, nor will I be able to respond to  
> any replies
> until Tuesday!


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