Oracle 11G, access other schema's procedure

Question

Hi all,
I have a peculiar problem while calling a procedure from JAVA.
I have two schemas, SCH1 and SCH2. Java is connected to  SCH1. There is a procedure in SCH2, grant is given to SCH1. in SCH1 a synonym is created using the following commad.
create synonym PR_GET_DATE for sch2.PR_GET_DATE;
Procedure is given below. For testing, I removed all the actions inside my procedure.
create or replace
PROCEDURE PR_GET_DATE(
    P_REP_PROCESS_DATE IN DATE,
    P_REP_TYPE         IN VARCHAR2,
    P_ETL_DATE OUT DATE ,
    P_STATUS OUT VARCHAR2,
    P_MSG OUT VARCHAR2)
AS
  V_WK_REP_DATE DATE;
BEGIN
null;
end;
{code}
If I test this from SQLPLUS, it works fine. But if I call it from Java, I am getting the following error in Java. But if I compile it in SCH1 and try calling from java, it works fine. Can someone please explain me the possible cause of this behaviour.
org.springframework.jdbc.BadSqlGrammarException:
CallableStatementCallback; bad SQL grammar [{call PR_CLMSR_GET_REP_DATE()}];
nested exception is java.sql.SQLException: ORA-06550: line 1, column 7:
PLS-00306: wrong number or types
of arguments in call to 'PR_CLMSR_GET_REP_DATE'
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
Thanks,
Jaggyam

Answer 1

Thanks All for you response!
Grant is given, otherwise it would have been clearly mentioned in the error
We are passing all the parameters with appropriate value. To throw more light on that, we did not make any change in the java. But simply dropped the synonym took the copy of the procedure from SCH2 and compiled in SCH1. After doing so, I didn't get any error in Java. So nothing wrong in the number of parameters passed or their type.
By looking at the error message, even I thought the parameters are not properly passed from java. But without making any code change Java, it is working fine after we moved the procedure to SCH1. Again in either case when I called from SQLPLUS, I had no issues. I don't have a concrete evidence to put in front of my Java team to prove that nothing is wrong in the code.
Kindly throw your thoughts please.
Thanks in advance,
Jaggyam