Make sure you have no hidden bodies. Also can you upload the files to test.
I have got hidden bodies in it
but I am interested only that beam and cylinder
and they do not interference as program calculated
so why I am seeing they being through ,
I experimented saved as sat and opened
in friend's Inventorseat and everything is ok.
In SW have that weird inconvenience
When you do interference detection, you need to select the components in which you want to check the interference or the complete assembly.
When you have an object behind a relatively thin wall, SW often decides to show the object, even though it doesn't come through or up to the outer wall. It's one of those things that most of us just learn to live with, although I seem to remember that someone recently posted that a certain viewing or display mode would display correctly. Unfortunately, I don't remember what the mode was. You might try searching in the forums to see if you can find it. I think it might have been about parts showing up in drawings that should not have been seen.
I analyzed your post and it appears right
my wall is thin so let it be that SW decides
show the wall when manipulaing object or setting ,
I seek proper mode although this weird mode
is quite tolerable for me ,