I had a this kind of case where I got an error when I tried to see the Report Studio report in Excel format. Reason for the error was that I had a background image in the report page. The image was JPEG and size is 1100x800 px. I decided to remove the image from the report.
Because I don't know how Excel handles images I'm still intrested to make tests where I use smaller image and/or GIF format.
