Landscape export layer then reimport layer broken with raw8

I set up a basic material with one layer on it. I made a new 57x57 landscape, with the material loaded into the slot. I made the layer blend file. Created the landscape and saved all. From there, I went into the paint landscape tab and right clicked on the layer.

  1. I chose the “export to file” option and saved it as a raw8.
  2. I chose “import from file” option.
  3. This is the error I receive every time.

When I perform this same task, but use PNG instead, it works fine.