Unlock block mode / rendered viewport

Hello!

I have the follwong problem:
I edited a block instance, everything else is gray and i cannot select it.
then i leave the block with “unlock”, right? what’s the correct way?
when i do this, everything gets transparent and i see all the edges though i am in rendered mode in all viewports. it seems to me like a bug?

can anyone help me with this?

thank you!

Which Rhino version are you running and what is your system information? (You find your OpenGL information under Rhino Options - Display)

hey wim,
it was some kind of error indeed and works again.
sorry and thank you!