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I have a pl/sql procedure on an Oracle 11g that has the following parameters: PROCEDURE validate_product ( product_id_in IN varchar2 , username_in in varchar2, source_in varchar2, source_id_in varchar2 , isEuProduct in boolean , error_code out varchar2, product_type out varchar2 ) I am trying to call the above stored procedure from within java using the following code: cstmt = getConnection().prepareCall("begin " + DBUtil.SCHEMANAME + ".PRODUCT_UTILITIES.validate_product(:1,:2,:3,:4,:5,:6,:7); end;"); cstmt.registerOutParameter(6, Types.CHAR); cstmt.registerOutParameter(7, Types.CHAR); cstmt.setString(1, productId); cstmt.setString(2, username); cstmt.setString(3, sourceName); cstmt.setString(4, sourceId); cstmt.setBoolean(5, isEUProduct); cstmt.execute(); The types of the java variables are all String with the exception of isEUProduct which is boolean . Whenever i run the above program i get the following error: PLS-00306: wrong number or types of arguments in call to validate_product ORA-06550: line 1, column 7: PL/SQL: Statement ignored" I must have debugged the program a hundred times but everything seem to be the correct type and the number of arguments are correct. I am completely stuck as to what it is i am doing wrong. Having googled around i suspect that maybe i am not setting the boolean parameter correctly. Any ideas?

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