During archiving, if the value of the variable controlled by the SerialNumber is empty, then the tool will always create the value of the SerialNumber.
If the option:Recalculate the value of the SerialNumber at each archiving session. is checked, then the SerialNumber will recalculate a value at each archiving (without taking a new number) if a counter has been defined in the value.
The calculation of the SerialNumber is done when the file has been modified and archived (modification of a variable value for example).
File card setup view :
Result obtained :
The button Increment will allow you to take a new counter reading.
The button Recalculate will recalculate the concatenation (useful if a variable value has changed).
Note : The counter value has been saved (present on the file card) so that there is no counter increment.