// the line below doesn't attrib the result of executeQuery to a
ResultSet object
stmtHTML.executeQuery("Select Cod, Nome From Cliente Order By Nome");
// a generic method... used in many places and systems
GeralHTML.PreencheComboBoxCodDesc(stmtHTML);

and into PreencheComboBoxCodDesc method, I have this code:
ResultSet rs = stmt.getResultSet();

I can't change the method to pass a ResultSet rather than a Statement
because this generic method is used in many places and systems...

org.firebirdsql.jdbc.FBSQLException: Only one resultset at a time/statement.
at
org.firebirdsql.jdbc.AbstractStatement.getResultSet(AbstractStatement.java:601)
at
org.firebirdsql.jdbc.AbstractStatement.getResultSet(AbstractStatement.java:589)
at SubMacroUtils.GeralHTML.PreencheComboBoxTipoCodDesc(GeralHTML.java:806)

How to solve this?