Pixel Mapping - no content in preview

Hello all,

I've been working on learning pixel mapping on the Ion. I've watched the tutorials and downloaded the workbook. All is fine until I attempt to select content and have it display in the pixel map preview. I select the content as shown in both the workbook and video, but I get nothing in the pix map preview. I've double-checked everything, but can't figure out why this isn't working. 

Any help is appreciated. 

Michael

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