autocad crashed - now all my blocks are invisible - selectable but invisible.  They show all properties in the properties menu as normal.  Any ideas?Thanks

Invisible for printing or invisible in layout or invisible in modelspace?- in printing: check if the layers in which blocks are inserted and sorce layers of enetities in block aren't non-printing (there is the icon of printer for each layer in Layer manager, it shouldn't be crossed out)- in Layout: turn on (thaw) layer in viewport- in model: please better describe your problem

IN MODEL SPACE - ALL BLOCKS INVISIBLE BUT SELECTABLE:  CAN SELECT AND BRING UP PROPERTIES WHICH LOOK NORMAL. I COPIED THE DRAWING INTO A NEW FILE AND THEY WORK NOW.THANKS,