(Dependencies between the individual modules of the whole project)

The image above shows the dependencies between the individual modules. A module is depending on the modules it has an arrow to and those it dependencies depend on. When Adding a new module (expecially a new extension) to the solution you have to add the dependencies. Otherwise you will get several linker errors.
The white modules are part of the standard simulation.
The red ones are external libraries not included in the Visual Studio Solution and often linked as libraries. Other modules than their direct dependants are not depending on them.
The blue modules are extensions.