Hello lunagolya,
16 GB RAM seems to be insufficient for mesh reconstruction from the depth maps using the depth maps of the selected quality.
We are optimizing the depth maps based approach for the mesh generation, but yet it is not fully out-of-core, so you may need to extend the amount of available virtual memory, for example, by increasing the disk swap size.
If you wish, you can share the project with the depth maps with us and will generate the mesh model from it and provide the information regarding the memory consumption peak both for dense cloud and depth maps based approaches.