The database technology that is used in HICSOAP PROFESSIONAL is Microsoft Access. The limit of the size of the database is on the size of the database file and not the number of records. The maximum database size is 2GB, but you may have problems, if the database size gets above 1.5GB
I've never seen a database that is larger than 100MB which is 1/20 of 2GB. So for all practical purposes HICSOAP's patient size is unlimited.