Layout missing menu bar items

Dear all,

I'm using Cadence IC6.1. When I open the layout editor only three menu items are present (Lanuch, Calibre and PDK). I can do the layout, DRC,LVS and XRC are all OK. Shortcuts work fine as well, but I can't do other layout jobs, for example flatten a cell, because the menu item is missing.

 When I look at the  CDS.log window, I find the following:

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*Error* eval: unbound variable - vuiVerifyMenu
<<< Stack Trace >>>
(... in _leGetAssuraMenu ...)
(... in leMenuTrigger ...)
(... in _deApplyTrigger ...)
(... in unknown ...)
funobj@0xf2fe2d4()
(... in _dePullTrigger ...)
(... in _deCallMenuTrigger ...)
(... in _deMakeBannerMenus ...)
(... in _dePostOpenProcess ...)
(... in _deOpen ...)
(... in deOpen ...)
(... in ddsServOpen ...)
ddsServOpen("kit_test" "Inv1" "layout" "edit" nil)
(... in ddsEditCB ...)
ddsEditCB("kit_test" "Inv1" "layout")
*WARNING* A Skill error occurred in function leMenuTrigger

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Any Ideas how to resolve this issue ?