Resolution:
ORBacus is a fully CORBA compliant ORB that is distributed as source code by IONA. See http://www.iona.com/products/ORBacus_home.htm for
details. It can be downloaded from the IONA site. You will need to register with IONA for the download of ORBacus and for support from the ORBacus
Support Team. You can register for a fully functional time limited (currently 30 days) evaluation version.

As of this writing, depending on the operating system you use, you can download the following from IONA:

     OB-4.1.1-eval-README (Readme)
     OB-4.1.1-eval-CHANGES (List of changes in the latest versions)
     OB-4.1.1-eval.tar.gz (Source code tarballed)
     OB-4.1.1-eval.zip (Source code zipped)
     OB-4.1.1-eval-bin-hpux.tar.gz (IDL compiler for HP-UX 11.00)
     OB-4.1.1-eval-bin-solaris.tar.gz (IDL compiler for SUN Solaris 2.6, 7 and 8)
     OB-4.1.1-eval-bin-win32.tar.gz (IDL compiler for Windows 95/98/NT/2000 tarballed)
     OB-4.1.1-eval-bin-win32.zip (IDL compiler for Windows 95/98/NT/2000 zipped)
     OB-4.1.0.pdf (C++ and Java documentation in Portable Document Format uncompressed)
     OB-4.1.0.pdf.gz (C++ and Java documentation in Portable Document Format tarballed)
     OB-4.1.0.pdf.zip (C++ and Java documentation in Portable Document Format zipped)

All IDL compilers require an evaluation key On completion of your download an evaluation key will be sent to you by mail, although for your first download
only.
These downloads contain only source code, IDL compiler and documentation. They do not contain any libraries. You will have to compile the source code and build the libraries. Also, please the FAQ items in the "ORB Issues" and "Build Issues" categories.

Where and how do I get evaluation versions of the ORBacus 4.1.x libraries? I want to use version 4.1.1 of the adapter with ORBacus 4.1.X?