Saved Watermark Settings. Cannot convert source image file to PDF Error.

Hi Simonwhit,

Hope you are doing well and sorry for the trouble. As described, you are unable to insert a saved watermark and getting the above error message.

What happens when you try to insert a PDF source file as watermark? Please try to convert the BMP  image file to PDF first and then try to insert it as watermark and check if that works.

Also make sure you have the latest version of Adobe Acrobat DC installed. Go to Help > Check for updates and reboot the computer once.

If it still doesn't work, please try to repair the installation from the help menu (Windows Only) and check.

If it still doesn't work, would you mind sharing the BMP source file that you are using as watermark so that we can check it at our end. You may upload the file to the document cloud https://documentcloud.adobe.com/link/home/ generate the link and share that link in private message.
Click on the message icon on the top right corner of the screen to initiate the private message.

Regards

Amal