DBMS_JOB - Pass Date As Parameter To Another Stored Procedure?

I have created a stored procedure that checks if a file exists and gets a date from the file if it exists. The date is then used as a paramter. See below:

CODEcreate or replace
PROCEDURE                     "P_Load_Stamp" AS
v_exists BOOLEAN;
v_length NUMBER;
v_blocksize NUMBER;

[code]...

The above codes works perfectly and I scheduled it using SQLPLUS as follows:

CODEvariable jobno number;
variable instno number;
begin
select instance_number into :instno from v$instance;

[code]...

My problem is that I need to pass the date from the above procedure as a parameter to another stored procedure. So I modified my code as follows (the parts in red):

CODEcreate or replace
PROCEDURE                     "P_Load_Stamp" (vCTIDATE OUT varchar2) AS
v_exists BOOLEAN;
v_length NUMBER;

[code]...

Now it doesn't strike me as a rights issue since I created it in the schem schema. What could I be doing wrong here?