Thanks for your reply Dave.
Sorry, I mistyped the script. It should be like this:
SELECT tv.pm_name, tv.tech_name, empl.f_name, empl.l_name,
empl.address, empl.phone, empl.fax
FROM task_view tv, employee empl, role rol
WHERE tv.contract_id = rol.cpmtract_id
AND rol.ind_id =...