I have a cannon 7d. I have done all updates to the photoshop elements 12 and I can not open any pictures that are taken in raw. Why?
Please check the version of camera raw.
Canon 7D is supported with at least 5.6 version of Camera Raw,
And it is 7D Mark II then it is compatible with minimum camera raw version of 8.7 that is not compatible with Elements 12.
Check this article to download camera raw 8.3 and more clearance on the support information : Adobe Camera Raw Help | Adobe Camera Raw 8.4 or later on Mac OS 10.6, Windows XP, and Vista
Adding to above post, you can also use the DNG Converter to convert the raw images to DNG and use it with current of the software you have.
Refer below the download link:
Let us know if that helps.