Ally Hoad

I’m new to MeshLab (i.e. used it for the first time today) and am struggling to simplify my model. I created a model in Rhino3D and converted it to an STL but the file is too big for me to upload to the 3d printer so I downloaded MeshLab. When I try to simplify: quadratic edge collapse decimation (with texture), it says that the current mesh does not have “Per wedge texture coords”. Please could someone help me with what the means? TIA :)