all sub assem showing but above main assem is hidden .i triad to showall ,activate option but main assem not shown
was this an imported assy? its possible that you have no design bodies, only surfaces... surfaces do not show at the assy level by default you will need to show them manually.
has this assy ever "worked" for you?
Right mouseclick in the screen
Tick show all for everything
I TRIED THE SURFACES ON BUT STII NOT SHOWN
ONCE I OPEN SUB ASSEM FROM SAME .IT OPEN AND SHOWN EASILY
ONLY MAIN ASSEM NOT SHOWING
Are you in design mode?