problem in creating zstrcture

hi,

i am trying to create one zstrcture by including some fields and some standard strctures with .include. i am getting the error when checking the object.

the error is Check table ZUSCHANGE (ISCDEV01/30.08.07/11:38)

Enhancement category 4 possible, but include or subty. not yet classified

Several fields of type LANG: Select one of these as text language

Table ZUSCHANGE was checked with warnings

what is the solution for this one.