R2005 Vlisp: I have attached an object reactor to a point entity. I have a call back for modify, erase or unerase. If I undo a mod or an erasure I get an error. Command: e ERASE Select objects: 1 found Select objects: :VLR-erased #4 Point #<VLA-OBJECT IAcadPoint 01077044> has been erased.:VLR-modified Command: u mesh flatten :VLR-modifyUndone #1 :VLR-unerased #5 Point #<VLA-OBJECT IAcadPoint 01077044> has been unerased.:VLR-modified The Location is ; error: Automation Error. Object was open for undo What do I do to "close" an object so when I undo and it reacts again for the mod it doesn't crash. TIA Bill