EventPorts without EventOut not regarded

I am not quite sure if it is a bug or intended behavior, but whenever we utilize an out EventPort in our model without the corresponding EventOut directive, this port seems not to be further regarded during the simulation. For example, if we define an explicit input (e.g. ), it is required to have an output port in the target model. If this model provides an out-port, but without a corresponding eventout directive, this port can not be further used. By debugging jLEMS I somehow tried to locate the problem: In core/run/WithBuilder, there is a method called postBuild() which is used to retrieve the source and target by the path. However, the component returned as source/target does not contain any output ports (if no out directive is stated), therefore the overall process stops with an nullpoint exception given the fact, that no output port can be found.

I am fully aware that we can avoid this problem by simply stating an event-out directive, but this can result in other problems, e.g. when components communicate between each other.

Start in core/run/WithBuilder.postBuild() and trace how the source and target are retrieved for an explicitInput targeting a model with an out EventPort but no eventout directive. Reproduce the null-pointer failure with that model arrangement, then verify that the port remains usable during simulation without requiring an eventout directive.