The Integration Service interprets constants in an expression as floating-point values, even if the calculation produces an integer result. For example, in the expression INTVALUE + 1000, the Integration Service converts the integer value “1000” to a double value if high precision is not enabled. It converts the value 1000 to a decimal value if high precision is enabled. To process the value 1000 as an integer value, create a variable port with an Integer data type to hold the constant and modify the expression to add the two ports.