Q  Why does the system force individual entry for serial numbers with prefixes or characters?

A  If user enters both character and number in one field, then it is hard to know which part (character or number) needs to be increased first.  So the system cannot predict how the range is intended to increment:  For Example if user enters a SN range of A101 to Z110.  The system does not know how the user wants the range setup  A101, B101, C101  or  A101, B102, C103, etc.