My Adobe Reader DC will not open a file. It displays an error message. When I check the file it says it is imcompatible?

Hello Df_flynn,

We're sorry for the delayed response and inconvenience caused. As correctly said by Aandi, please share more details so that we can assist you in a better manner.

Are you not able to open one specific PDF file or all the PDF files? Is it possible to post a screenshot of the error message you are getting?

To share the screenshot, refer to https://forums.adobe.com/docs/DOC-7043#jive_content_id_How_do_I_attach_a_screenshot

What is the dot version of Adobe Reader installed? To identify refer to Identify the product and its version for Acrobat and Reader DC

Is it a Mac or Windows machine and what is the version of the OS installed?

You can also refer and try the suggestions from the Adobe article Can't open PDF Make sure that you have the latest version of Adobe Reader installed, check for any pending updates from help>check for updates, reboot the machine after updating Adobe Reader.

Let us know how it goes and share your observation.

Thanks,

Anand Sri.