Problems exporting R graphs with Ubuntu

[Sam Albers]

I have trying to figure this out all day so hopefully the answer isn't too
obvious. I am creating graphs in the statistical program R. The program
allows me to export graphs into PNG files as well as a bunch of file
formats. However, when I do this an icon appears that is 0kb in size and has
a orange clock on the bottom of the icon. When I attempt to open the PNG
file i receive a "Could not load image 'Compare.png'." message. I have the
libpng12-0 package installed and I have been successful at using PNG files
on other occasions. I am also tried this with all the other file formats
available but to no avail. I am not sure what the orange clock means and am
wondering if it is a clue to solving my problem. I feel like this is a
Ubuntu issue rather than an R issue but if I am wrong I apologize. Thanks!
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