THANKS! This demo.rar works wonderfully until the value is less than 1.00E-009 like 1.00E-010 then it stops with an error 4100. I can limit my displayed range from 1.00E - 9 to 1E-3 with out too much of a problem but am stumped as to why it STOPS. Stop error occurs on the line BIN D204 D304 when D204 becomes 10. I have tried to figure out what the problem is but I am lacking in experience, but learning fast. I have attached the demo2.zip with and edit to accept more decimal places. demo2.zip