There are three areas that require special attention when using
qsave_program/[1,2].
- If the program is an embedded Prolog application or uses the foreign 
language interface, care has to be taken to restore the appropriate 
foreign context. See section 
12.2 for details.
 
- If the program uses directives (:- goal.lines) that 
perform other actions than setting predicate attributes (dynamic, 
volatile, etc.) or loading files (consult, etc.), the directive may need 
to be prefixed with initialization/1.
 
- Database references as returned by clause/3, recorded/3, 
etc., are not preserved and may thus not be part of the database when 
saved.