Substitution of a profit center at FI document posting

Question

Dear experts,
I have created a cost center in which master data no profit center has been indicated. This because I have set up a substitution that, with a user exit check a custom table, retrieves the correct profit center to be used in the posting and populate it in the "Profit Center" field.
The problem is that the system is then changing the content of the field profit center with the dummy profit center (since no link between profit center and cost center is indicate ad cost center master data), which is not correct.
Do you know how can I overcome or avoid this automatic substitution that the system is making?
If I include a profit center in the cost center master data the system is anyway changing the one included in the document by the substitution with the one included in the cost center master.
Thanks in advance for the help.
Regards

Answer 1

Hi again,
actually OSS note 62417  and 102737 seem to indicate that the  behaviour you observe is intended by SAP:
We must have done something to our system to change this behaviour and make substitution work. I will try to find out what this might be.
62417
Symptom
In accounting, posting is carried out to a dummy profit center, although the triggering billing document contains an explicit profit center.
The dummy profit center is set in a line item after a profit center has been explicitly entered first.
Additional key words
VF01, FB01, profit center, CO interface
Cause and prerequisites
In addition to the profit center, the line item contains further CO account assignment objects, for example, cost center, order or profitability segment. Among the account assignments entered in addition to the profit center there is an actual CO account assignment object, for example, an actual order. In this case, the system requires that you always post to the profit center of this order. If no profit center is assigned to the order, posting is done to the dummy profit center.
Under such circumstances, the system cannot post to the explicitly assigned profit center, since in the case of a later CO-internal allocation of the order to another order, the profit center assigned to the other order will always be credited. However, debit and credit must occur on the same profit center so that profit center accounting stays consistent.
Solution
The effect is authorized:
Under such circumstances, the system cannot post to the explicitly assigned profit center, since in the case of a later CO-internal allocation of the order to another order, the profit center assigned to the other order will always be credited. However, debit and credit must occur on the same profit center so that profit center accounting stays consistent.
OSS 102737:
Symptom
You want to reset the Profit Center in the document using a substitution (OKC9).Although the substitution is defined correctly, another profit center is written in the document afterwards.
Other terms
CO interface, profit center, G_VSR_SUBSTITUTION_CALL, KI339, KI 339
Reason and Prerequisites
In the line item, a posting is carried out to a controlling object which is assigned to a Profit Center.However, the substitution places another Profit Center into the line item.
Solution
The Profit Center of the line item and that of the controlling object posted to the line item must be identical.A substitution under these conditions is ineffective.
Header Data
Release Status: Released for Customer
Released on: 10.01.2002  16:10:40
Master Language: German
Priority: Recommendations/additional info
Category: Consulting
Primary Component: CO-OM-CEL-E Postings
Secondary Components: EC-PCA Profit Center Accounting
FI-SL-VSR Validation, Substitution and Rules
Affected Releases
Release-Independent