If call countourtool wiht parameter "--glucose-units mg/dl", i get the followig issue:
server01 contourtool # contourtool --glucose-units mg/dl
Sequence,Timestamp,Type,Value,BelowScale,AboveScale,BeforeMeal,AfterMeal,DontFeelRight,Fasting,Sick,Stress,Activity,HoursAfterMeal
IO or protocol error: [Errno 5] Input/Output Error
server01 contourtool #