When i import files of autocad to sketch, qhen i want to exclude de small details apperas in red and give me problems and donÂ´t let me extrude. i think that is a problem with the tolerances. Somebody can help me? Thank you.
You may have broken sections in your sketch where two lines come close but dont actually connect. You cant extrude with broken sections like that. Another sketching error is having one line on top of another in the sketch. That will also prevent you from solving and extruding. Sometimes when I import in a sketch I'll just redraw over it in Pro E and erase the imported sketch as I go.