All program have the problem for these users. But in my PL/SQL Dev(and some others) the same program with the same database work correctly.
example :
CREATE OR REPLACE PACKAGE Bridge AS
PROCEDURE p_bridge_full (
i_Target_Lot IN INTEGER,
i_Label IN INTEGER
);
PROCEDURE p_bridge_partial (
i_Target_Lot IN INTEGER,
i_Target_Project IN INTEGER,
i_Target_Table IN INTEGER,
i_Label IN INTEGER
);
END Bridge;