Hi Jyotsna,
Please use NODIM() Bex function to avoid such error. You've to create one formula and within the formula bring NODIM function with the required keyfigure where you face such issue. ie., you've to add NODIM(Keyfigure).
You can also keep the constant value for 0UNIT from the transformation by providing required unit(ie., kg/L etc.)
Please check if this works for your. Please let's know.
Regards,
Antony Jerald.