Engine config decals

[wolfnut70]

I ran into an error I can't seem to over come and have found no luck googling it.
I am trying to edit the Model numbers and set them to colormat0. I have tried exporting them one at a time as an obj and I have tried exporting the entire engine Transform group. All seems to go good until I try to set them to colormat0 in Blender. I get the following error. ""blender select vertices are not within a single integer block /UDIM"". Can someone guild me to finding a solution please?