Hi Ganapathy,
I have checked according to your advises, the result is as below:
(1) X-plant matl status --> empty
(2).Do Not Cost --> not set
And I also checked the change document in BOM, this BOM was created by IDOC BD20. Is it related to the BD20? Do you have document or note/thread about it? Thank you.
Best Regards,
Bu Fanchao