I’m editing a block in block edit mode ade sometime after I’m pressing OK to approve the block disappear, it’s still exist and I can insert it to the model but the original is disappear.
any clue why it happened?
No clue yet… If you have a reproducible case, please send it (firstname.lastname@example.org) with the blow by blow instructions. I don’t think I have heard this one before. Are you using Add Objects or Remove Objects, or changing the base point, or just editing within the block object?
do you have the latest service release of Rhino? They fixed something recently that alleviated my “disappearing-block” problems.
Try ClearDrawOrder the object within the block! It helped in my case.