A problem with the SONARtrac transmitter ‘totalizer’ function has been discovered. When a ‘USER’ unit (customized volumetric unit based on an existing standard transmitter defined unit) is selected for display and the totalized units for display are desired to be the same ’USER’ unit, the totalized units will be incorrect. Note: If standard transmitter units (gal, i- gal, m^3, l) are selected the totalizer functions work properly.