extrude with widget not working ?

in one file I got a problem with extrude with widget

it does not work like in other files I have

I select vertex then E key LMB and try to move the widget and it does not work!

what could be doing this on Window OS ?

note: Magnet is not on and neither prop edit !

thanks

“Does not work” as in “does not move” or “extrusion is gone”? In the latter case, check if you have Auto-Merge on.

as soon as do the LMB click the extrude is cancelled!
and doing this only in this file !
may have touch some keys and now got problem!

where is that auto merge ?
mean in the subsurf modifier
does not change anything !
strange !

do you have window
I can upload sample file

thanks

http://wiki.blender.org/index.php/Doc:2.6/Manual/Modeling/Meshes/Editing/Basics/Deleting#AutoMerge_Editing

If you have that on, as soon as you LMB to confirm extrusion, the vertices get merged back.

yes it was set
but don’t see any short keys for it
and I did not change that
don’t understand how come this was set !

thanks

There’s a button for it in 3D View header, maybe you pressed it by accident (it’s to the right of snapping dropdown).