IFXMRDATA type and JDBC read pb

Hi, I'm using the type IFXMRDATA (not a std type, an Excalibur datatype) accessed through a JDBC2 driver. - The choice of this type was determined by the use of Excalibur(1.20tc1) search datablade ... - As we have no pb with the insertion, we're experiencing problems when reading and deleting rows : Ifx returns errors like "A customized type map is required for this data type." We created a customized type and mapped it in jdbc, but we don't know how to write the "readSql(stream)" method. The stream object reveived is of the type ifxUDTInput. This type is not documented anywhere as far as I know, and no standard read method works on it (readByte, readStream, readObject...). Anybody has an idea or experiencing the same pb ? Thanks in advance ;) We're running IIUS ver 9.14tc7with JDBC2 on NT4 Vincent Roudaut Application Dev Reef Corp