Hi All,
As part of my water tank project on revit I wanted to create a void shape on my raft to insert the sump form according to the image below ... but it is impossible for me to create a void !!
Note: I modeled my raft by using an in place component then the revolution tool.


I followed several tutorials for the creation of voids and I modeled a void shape by using in place component then extrusion tool and chosen cut the geometry but it does not work !!! ... an error message always appears telling me that the void shape does not cut any element and will be deleted !! (see image below)



Note: by choosing the slabe tool to creat a raft it succeeds and the void can becreated... but my raft shape is complex and I have to use an in place component to model it and in this case the void cannot be created!!!
how to remedy this problem?