Steps to reproduce:

• Load image
• Create Segmentation
• Add multiple clipping planes
• You will get an error "Please select less or equal 6 clipping planes!"
• Add even more...
• Click "Update volumina"

The image will be segmented in 7 segments, but all partial volumes will be shown in the volume table. It should be easy to expand this functionality even to multiple segments.

See attachment (here: 7 segments, but 14 partial volumes are calculated).