How to snap the Openplant Connect edition elements when it is referenced in the other openplant connect edition?

Hello,

We have two models In OpenPlant Connect Edition to route our pipes, one to existing pipes and one to new pipes. But when I try to route any pipe conected to the existing model pipes referenced in our new pipes model We can´t touch the snap point in existing pipes model. If We open  this models in Microstaion Connect not Open Plant the option is availabe but in Open Plant is not possible

Could you help us please

Thanks 

Juan