http://www.zwsoft.com/forum/viewthread.php?tid=947 There is, what I consider a bug, in the history editing in ZW. (I could have sworn this was fixed back in v12). When you edit or redefine a history operation and hit escape or cancel the operation with the "cancel" button, ZW deletes the operation from the history. I find this frustrating. A good example of where I use this is editing blend radii from say .05" to .1" after a few other model changes are made. Undo will bring the feature back but it does make it easy to wipe out an entire history by accident. Maybe it's just me. Any thoughts from other users? cncsurf 2011-11-01 21:27:29 http://www.zwsoft.com/forum/viewthread.php?tid=947&pid=5283 Awesome. Thanks cncsurf 2011-11-11 15:38:03 http://www.zwsoft.com/forum/viewthread.php?tid=947&pid=5282 Warren, Thanks for reporting this. It got in just under the wire. This is fixed in 2011 SP2. You should see this in less than 2 weeks. LynchMikeVX 2011-11-03 09:38:41 http://www.zwsoft.com/forum/viewthread.php?tid=947&pid=5280 To reproduce this I had to Right-click on the last command in the history and "Redefine" then "Cancel". THEN..., "Right-click > Redefine Last > Cancel." A simple undo > undo will bring it back. Warren, if you are doing something different let me know. This scenario has been written up to be fixed. LynchMikeVX 2011-11-02 08:57:26