I probably have some fundamental misunderstanding. I tried to imbed a profile in a tiff file using cctiff -d xxxx.icc a.tif b.tif which returned without comment, so I assumed it worked. I then tried extract b.tif c.icc and got extracticc: Error - error writing file 'c.icc' Also, when I click on extracticc in my local copy of the documentation, I find the html page does not exist. this is confirmed by looking in the doc subdirectory. It does exist in the online copy of the documentation. So I'm probably not understanding something.