#8 link error in Rxlib for C++ Builder 6.0

[Jorge Arias]

I got the rxlib for C++ Builder 6.0 but when I build the
proyect drxbd6.bpl there is an error:
[Pascal Fatal Error] RxBDEReg.pas(30): File not
found: 'DesignIntf.dcu'. I can't find This File.
What can i do to fix this error?