Why cant i extrude in cinema 4d?

If you're unable to extrude in Cinema 4D, it may be due to a few common issues. First, ensure that you have a polygon object selected, as extrude only works on editable polygons. Additionally, check if the object is in a suitable mode (like Polygon Mode) and confirm that your object isn’t locked or hidden. Lastly, if you're using a generator object like a Sweep or Loft, remember that they don’t allow direct extrusion.