my first steps with IBObjects!

trying to set up IBO for C++Builder5 professional(german), with
Update Pack 1. I did compile (build) all packages successfully except
IBO40EDT_C5.bpl (the linker failed with "Fatal: Unable to open
file 'COPKG32.OBJ'"). Indeed there is no file like this anywhere on
the disk.
I used IBO-sources version 4_4_A.
Any problem with the version of CPPB5?
Searching for COPKG32.OBJ at the Borland Community without result ...
If you could give me a hint it would be great. Any doubt using IBO
without this package?