The program is not reporting a feature failure; it is reporting a body mesh failure. It just happens that the name of the body is the name of the last feature applied to it.
You have made a motorcycle frame using thin-wall tubing to create this structure. SimulationXpress is not well equipped to handle that kind of geometry though. These kinds of structures are better analyzed with beam mesh (toward the beginning of a design) and shell mesh (toward the end of a design). Neither of these are options for SimulationXpress though. The very best you could do with SimulationXpress is to set the mesh element size to be smaller (probably as small as you are allowed to make it) and see if the mesh does not then generate.
Thank you for the response, that is unfortunate I will try ansys or comsol.