REFERENCE CURSOR NOT CLOSING - Urgent!!!!!!

Question

I have some Oracle Stored Fucntions which return REFERENCE TYPE CURSOR. I noticed they are not closing. I even tried the following , but no luck. Any help is much needed.
PACKAGE Types
AS
PRAGMA SERIALLY_REUSABLE;
TYPE ref_cursor IS REF CURSOR;
END Types;

Answer 1

Thanks Justin.
As you have replied to my query , I am placing the next again.
I am using the following code :
counter = 1;
parm_status = OCIParamGet(stmthp, OCI_HTYPE_STMT, errhp, &mypard, (ub4) counter);
/* Loop only if a descriptor was successfully retrieved for
current position, starting at 1 */
while (parm_status==OCI_SUCCESS)
     /* Retrieve the data type attribute */
     OCIAttrGet((dvoid*) mypard, (ub4)OCI_DTYPE_PARAM, (dvoid*) &dtype,(ub4 *) 0, (ub4) OCI_ATTR_DATA_TYPE, (OCIError *) errhp );
When I have a stored proc with a reference cursor open then the above code works fine. But if I close the cursor before returning from the procedure then in the above case OCIParamGet() is returning a parameter descriptor , which raises unhandled exception when being called from OCIAttrGet().
I think as the memory got freed where the reference cursor points , oracle should return some exception that could be handled but instead I receive unhandled exception.
Is this a problem with Oracle or I need to something else at the client side.
Please let me know all your views.
Regards
Sutanu