check table XMDVW

hi

when cancelling a material document in MBST, i get this following error:

CHECK TABLE XMDVW : ENTRY 100890 1000 DOES NOT EXIST...no clue as to what this is and there is no table or structure with the name xmdvw, but there is a structure mdvw...any light on this would be highly appreciated...thanks

Sathish. R