>Set/clear spy-points. trap/1Install a trap on error(Formal, Context) exceptions that unify.

F.2.36 library(prologjiti)

jiti_list/0	List the JITI (Just In Time Indexes) of selected predicates.
jiti_list/1	List the JITI (Just In Time Indexes) of selected predicates.

F.2.37 library(prologpack)

atom_version/2	Translate between atomic version representation and term representation.
pack_attach/2	Attach a single package in Dir.
pack_info/1	Print more detailed information about Pack.
pack_install/1	Install a package.
pack_install/2	Install package Name.
pack_list/1	Query package server and installed packages and display results.
pack_list_installed/0	List currently installed packages.
pack_property/2	True when Property is a property of an installed Pack.
pack_rebuild/0	Rebuild foreign components of all packages.
pack_rebuild/1	Rebuilt possible foreign components of Pack.