ORA-06502 Character String Buffer Too Small When Called From C# App

I have researched this problem and checked my variable sizes over and over again. I have tested the procedure within the Oracle Express environment and it works fine; HOWEVER, when the procedure is called from my C# app it produces the ORA-06502 error.

The stored procedure signature looks like this...

Original - SQL Code

create or replace save_new_project (p_custorgid in number,
p_title in varchar2,
p_AOIName in varchar2,
p_description in varchar2,
p_receiveddate in date,
p_deadlinedate in date,
p_startdate in date,

[code]....

The OracleParameter in my C# app for the last out param is defined as such...

cmd.Parameters.Add(new OracleParameter("p_statustypedescrip", OracleDbType.Varchar2, 30, ParameterDirection.Output));

As I said at the beginning of this post, the procedure works fine in the Oracle environment. So why is it not working by simply calling it from C#? I've tried changing the OracleDbType to CLOB which eliminates the error but it returns a bizarre result. It returns this string, "Oracle.DataAccess.Types.OracleClob".

Since CLOB doesn't really work either I switch back to Varchar2 and specify a size of 5000 (in the database the field I am querying is defined as Varchar(30)). I still get the ORA-06502 error.

I am clueless as to what the problem is. It should work and it does if I run a series of SQL statements in an Oracle SQL Command window. The test that works fine looks like this...

Original - SQL Code

declare
v_projid projects.projectid%type;
v_statustypedescrip projectstatustypes.type%type; /* this is a varchar(30) */
begin
save_new_project(2, 'Some input text goes here', 'More input text', 'And more again','26-APR-2007','26-APR-2007','26-APR-2007','26-APR-2007','users name as inpujt text

[code]....

But calling save_new_project from C# throws ORA-06502. It identifies line 40 of my stored procedure. This is line 40...

Original - SQL Code

p_statustypedescrip := v_statustypedescrip;

p_statustypedescrip := v_statustypedescrip;