have you noticed in SE ST9 the disapperaed parts in the assembly mode ?
When I want to activate the part it is disappearing...
I have not, but I would suspect graphics card/driver. What graphics card do you have, and are you using an updated driver?
I would suspect the graphic card as well. I don't get that problem but what I do get is:
When the vid card is no longer able to clean up it's ram (I call it out of gas), then I can no longer select sketches for extruding or whatever. I can see it, but not select it. Very frustrating. Typically I have to reboot the computer every 3 hours to remove the problem.
I use K4200 Vid card.
In the reallly big picture. This is from Nvidia's drivers. Nvidia stole the good bits of code from 3Dlabs and have never implimented them 100%. Some version of drivers for each card have different problems then others.
Thanks Dudes for very quick response,
I faced this issue after my SE ST9 crashed. I believe thi is not a graphics, but maybe I am wrong.
I am having N Quadro 4000 with the driver ver. 10.18.13.6256 ( driver date: 10/05/2016 ).