I'm having a few problems getting the make_sql_persistent (part of the persdb_mysql library) predicate to work as intended. I've had a look at the people.pl example file, and my code contains the following.

At the top after loading the required libraries:

sql_persistent_location(database, db(Database, User, Password, HP)) :- database_name(Database), mysql_user(User), mysql_password(Password), mysql_host_and_port(HP).

...which I assume is correct. However, during my program I have:

make_sql_persistent(TypeList, NameList, database),

where TypeList and NameList have been dynamically generated earlier (this predicate is called recursively on all tables in the database). All works fine until I try to extract information from the database. No matter which table I try to access, it always comes up with an existence_error when I run the program. I've used write statements to check the contents of TypeList and NameList and both are generated properly, and if I remove the statements to query the database, the program completes without error. Since I'm using the exact same method of retrieving information as in the people.pl example (which works without any errors), I can only assume I've done something wrong with the make_sql_persistent predicate...

Anyone got any ideas??

Thanks in advance for any help..