problem in event raising

[priyank dev]

 include <cntn01>.
data: tobj type swc_object.
      SWC_CONTAINER  evt_cont.
swc_create_object tobj 'zdev' Y_VENDOR-vendornumber.
swc_set_element evt_cont '_evt_creator' sy-uname.
swc_set_element evt_cont '_evt_objkey' Y_VENDOR-vendornumber.
swc_raise_event tobj 'EVENT1' evt_cont.

where y_vendor is the object name created in swo1 and vendornumber is the
primary key field.
here iam facing an error with- Field "Y_VENDOR-VENDORNUMBER" is unknown. It
is neither in one of the
 specified tables nor defined by a "DATA" statement . . . . . . . . . .
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