The directory of plunit.pl and swi.pl must 
be in the
library search-path. With PLUNITDIR replaced accordingly, 
add the following into your .sicstusrc or sicstus.ini.
:- set_prolog_flag(language, iso). % for maximal compatibility
library_directory('PLUNITDIR').
The current version runs under SICStus 3. Open issues:
plunit.pl. Both coverage analysis and the test 
generation wizard currently require SWI-Prolog.
load option normal is the same as always. 
Use set_test_options(load, never) to avoid loading the test 
suites.
run option is not supported.