Hello
I can't display the result of the weight of a part
The density is well affected in edit materials, I select the part and then the icon mass property
but no result !
Since I have the Solidworks 2018 version, I no longer have the results window displayed.
Hello
Is it possible to see the play? It's easier to find the error.
Hello @
I'm also working on SW18, It sometimes happens that the window goes into reduced mode! 
I confirm that the mass property window is not displayed
Kind regards
See attached file
First this option window must be closed,
It can also come from a double screen being switched to a single screen and the window would be displayed on the 2nd screen which is no longer present.