Problem when archive a material with deletion flag(DF)

I met an error message when I archived a material with DF with program MMREO050.

The meesage is as follows:

MARC: 800 123456-0 1000 routing exists

MARC: 800 123456-0 1000 use in routing -Routing-

MBEW: 800 123456-0 1000 plant is assigned to the valuation area

MARA: 800 123456-0 Dependent material master data still exists

...

The problem is I can make sure there is No any routing associated with this material 123456-0, so I think there must be a field in MARC to triger this error, but which one?

Thanks.