MM-FI Account Determination

Dear Forum members:

I have an account determination for Posting Inventory differencies (mi07 and movement type 702) that from all indications is all of a sudden going to a different GL Account.

It is apparent that something has been changed in the configuration and as yet I am unable to determine what.

Here is what I know:

(a) Valuation grouping is activated (Plant Level) and from what I can tell, nothing has been changed here.

(b) The valuation Class of the material is determined from the material type and Account Category classifications

(c) The movement type, 702, is same as has always been.

(d) Split valuation is not activated for this material.

(e) I have checked for changes in the materials and nothing has been changed e.g. material type

This is a Production Client and it seems really strange that something could have been altered but I cant determine what. This problem has arisen because the system is now saying the materia is posting to an account requiring a CO object. Now I know I can go and configure the account to have a default CO object. But that will not determine the problem's root.

Forum members please help, is there something else I can check. I have researched for days now and found nothing.