In the attached screen shoot, i highlight the part where i edit the height of the middle part of the curtain wall. So i create 2 break point to allow me to lift the sill height of the middle part of curtain wall.
But after i save the setting, come back a few days later and tried to change the sill height, it just stop me doing that. No matter how many time i change it, the sill height is always go back to it current height.
Same thing happened to the length as well, when i grab the guide line and try to extend the curtain wall (just like how we extended the wall or beam), it will always revert back to it current position. It just stop me to change anything.
Plus i realised this is only happened to isolated case, not all curtain wall i create behaved like that. Some curtain wall allowed me to edit after i change the scheme but some don't. And the only solution i have to to delete and redraw to whole wall. Any clue what happened here?