Hi, I am currently having an issue with creating a domain participant. This is a C# application running on windows 7. For some reason, the program will run just fine on other PCs, but on mine the DDS.DomainParticipantFactory.get_instance().create_participant() call returns null. The instance of the ParticipantFactory returns from get_instance() just fine, and the shapes demo works fine on my pc. Really have no idea where the issue could be as there is no exception thrown in the call it just returns null. Also, I have the same version of DDS installed on my pc as on the pcs that run the program fully. Please help if you have any suggestions.