My colleage asked me thisafternoon about a block he had in a drawing sent from a client which he wanted to explode and move a red box on this block to a new area. Now he used the explode command like you do and nothing happened. So I suggested that possibly it was a read-only file, but we could edit other areas of the drawing and he had already copied this block once into another area of the file.
Does anyone know if it is possible to lock a block or why it is not possible to alter it?
For now he's managed to find a way around this issue, but it's nice to further the experience on CAD incase this issue pops up again!
If it helps, I will get a copy of the file as soon as he's finished working on it and upload it to this thread to see if anyone else can figure it out. Although you may know already?
Thanks everyone!