Create specification without component lower and upper limit

Hi,

I'm using the function module C1F5_SPECIFICATIONS_MODIFY to create a sepcification. In my component table, there is an average value but no upper or lower limit. These two values are intial ( 0.0000 ). If I call the function module, I get the error "The average value does not lie between the lower and upper limit".

How can I call this function module and pass only the component average value?