Hi raduteo
The sketchup importers on large meshes, models with unwarped materials, and sometimes for no reason aparent, can be almost useless. If you really want to import a high poly model into sketchup and avoid that error try dividing the model in 2 or 3 parts if possible in other software and import one at a time (preferably each part in a new file to avoid more errors. hope it helps
David