[Moved]: hfss error: entities in shell are not connected

I exported mesh from HFSS to meshlab and applied filter on it and import the result to hfss again. but the problem is that after healing it says entities in shell are not connected. can anyone help me with this problem ?
thank you
N.

I do not use meshlab so can not comment why you need to export your model to meshlab and then import it back. It is always recommended wit HFSS to make the model with the basic tools available in software. Can you explain a bit why you needed this meshlab. Error means that what so ever filter meshlab used that has made geometry inconsistent from HFSS definition

it's complicated human body mesh that I can't generate with basic tools . it consist of several organs with high resolution. I want to reduce the simulation time so I need to reduce resolution. one way is to export mesh from hfss to meshlab and apply filters for remeshing but as u said it makes error when I import the filtered mesh to hfss . would be grateful if you can help me to solve the problem
thank you

Ok I got your problem that mesh is very complicated and you want to reduce it so that you may be able to simulate it in HFSS? I will suggest you following line of action to attack your problem
First if possible divide the big model into smaller models.
Try to find and exploit Symmetry of your model if it is human body it should have symmetry as all the organs are in pair of two so one half of body is almost identical to the other part obviously not exactly. Symmetry plans greatly help to reduce the model.
Try to divide the total mesh means find the critical areas and define more dense mesh in those areas of interest and little relaxed mesh for relatively simple areas as mesh is highly dependent on geometry for simple structures you can have very accurate results with relatively thin mesh but for complex structures you are left with no choice but to go for denser mesh.
You can play with some relaxed accuracy as well
These are the few possible tricks which people use as to have accurate result without overloading your computational resources there is only one way out proper mesh. Last I would say again better to stay in HFSS as for complicated things it may take little more time but in the end results will be reliable