allowDefinition='MachineToApplication' msbuild error

Question

We have a ASP.NET MVC with 4-5 different build configurations. Whenever we change the build configuration, we need to delete the obj folder for the web project, since we get

Answer 1

I have a somewhat a similar problem, i had the main config as Copy Always so it copied the config to the bin directory. When i republished the main project, i got the MachineToApplication error. So my solution was to just change the config to Do Not Copy and remove the extra configuration in the bin folder.