The end value is the maximum value that you want the Integration Service to generate. If the Integration Service reaches the end value and the sequence senerator is not configured to cycle through the sequence, the mapping run fails with an overflow error.
Set the end value to any integer between 1 and 9,233,372,036,854,775,807. If you connect the NEXTVAL port to a downstream integer port, set the end value to a value no larger than the integer maximum value. For example, if you connect the NEXTVAL port to a Small Integer port, set the end value to a maximum of 32,767. If the NEXTVAL exceeds the datatype maximum value for the downstream port, the mapping fails.