If the Xiaomi Robot Vacuum 5 reports "Area is too small to be divided" when attempting to divide rooms, it usually means that the selected area is smaller than the minimum size required for partitioning.
To solve this, first rebuild the map to ensure the vacuum has an accurate layout of your home. Make sure all obstacles, furniture, and partitions are properly recognized.
Check for glass doors, mirrors, or highly reflective surfaces nearby, as these can interfere with the vacuum’s sensors. Temporarily blocking these reflective areas and then rebuilding the map can help the robot correctly recognize and divide the rooms.
After completing these steps, retry dividing the rooms, which ensures each section meets the minimum size requirement.