Every Pervasive PSQL database that you expect to access using an ODBC application must have a DSN that identifies the database. A DSN that points to a database engine is called an Engine DSN. Engine DSNs are 32-bit only and are deprecated. A 32-bit DSN that points to an Engine DSN or to a named database is called a
Client DSN. A DSN on a 64-bit operating system is simply referred to as a 64-bit DSN, without designation of Engine or Client.