Problem stills occurs on August 1st 2014.
When the following command is executed from the dos-prompt, dcraw fails as well:
dcraw.exe -6 -w -O output.ppm input.cr2
However, if the parameter -O is changed to lowercase, it's going well
dcraw.exe -6 -w -o output.ppm input.cr2
The newest version of dcraw (version 9.22 at August 1st 2014) expects -o parameter instead of -O.
That's why the calling functionality in ImageMagick also fails.
When the following command is executed from the dos-prompt, dcraw fails as well:
dcraw.exe -6 -w -O output.ppm input.cr2
However, if the parameter -O is changed to lowercase, it's going well
dcraw.exe -6 -w -o output.ppm input.cr2
The newest version of dcraw (version 9.22 at August 1st 2014) expects -o parameter instead of -O.
That's why the calling functionality in ImageMagick also fails.