I cant seem to get the Packed Map to render out, only the Color Map exports for me. If I try hitting Render Packed Map I get an Error on the node that says “Error rendering child: /out/rop_texture_sheets/composite_packed_pyro”. If I follow that path to the composite_packed_pyro that error says “Cook error in input: OUT_PACKED.”

Im in Houdini FX 16.5.571 with Game Development Toolset 1.110

I had the same issue and managed to resolve it. It seems like in the composite node of the rop_texture_sheet there is a scale before the mosaic node that rounds the values in a weird way making the mosaic node rendering a 1026x1024 image (for my resolution) wich make the resolution differ with the resolution of the color node.
To fix that i used a crop node to fix the resolution of the nodes plugged in the OUT_PACKED node to 1024x1024 and it removed the error.