Issue with Dial not displaying zero

[#1]

Dear All,

I have set up a simple Dial - with no Dimension, just a simple (ish...) expression;

=

Count ({<leadDescShort={'PRM'}>}leadSoldVehicleID)/Count ({<leadDescShort={'PRM'}>}leadContactID)

This divides Sales/Contacts to look at success of marketing activity

However, if I have Zero sales in this set - the Dial displays netiher a Needle, nor a value of Zero in the Text in Chart

I'd like to display a Needle and Text at Zero if the expression cannot be calculated, due to the Numerator being zero

Many thanks