Configuration variable problem

[Stathis Kamperis <ekamperi%gmail.com@localhost>]

Salute!

When I do:
atf-run -v iterations=1000 ./t_foo

the test program successfully recognizes the variable `iterations' and
uses its value.
When I do:

prop: iterations=1000
inside the Atffile and then:

atf-run ./t_foo

the test program fails with:
Requirement failed: atf_tc_has_config_var(tc, name) not met

Any hint on what I'm doing wrong ? :)

Best regards,
Stathis