How To Fix BK128 - Activity type & is not allowed for business transaction &

BK128 - Overview

• Message type: E = Error

• Message class: BK - Create, Display, Reverse Controlling Document

• Message number: 128

• Message text: Activity type & is not allowed for business transaction &

What causes this issue?

In business transaction &V2& you entered activity type &V1&, category
&V3&. This category is <LS>not</> allowed in business transaction &V2&.

System Response

You can use only activity types of given categories in a given business
transaction.
The following activity type categories are valid for a given business
transaction:

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

<ZH>RKL</> (Direct Activity Allocation):
Category 1 (manual entry, manual allocation)
<ZH>RKN</>, <ZH>RKIL</> (Indirect Activity Allocation):
Category 3 (manual entry, indirect allocation)
Category 4 (manual entry, no allocation)
<ZH>RKLT</> (Template Allocation Actual):
Category 1 (manual entry, manual allocation)
Category 2 (indirect calculation, indirect allocation)
<ZH>RKPS</> (Template Allocation Plan):
Category 1 (manual entry, manual allocation)
Category 2 (indirect calculation, indirect allocation)
<ZH>Note</>
You can post category 2 (indirect calculation, indirect allocation) and
category 5 (calculation and allocation using target=actual activity
allocation) activity types
<ZH>manually</> only if the indicator <LS>Manual actual quantity</> is
set in the activity type master data.
If this indicator is set for an activity type of category 1, 2 or 5,
you can post the activity types in the same posting transaction (entry
of sender activities) and together with activity type categories
3 and 4.

How to fix this error?

Enter an activity type with a category valid for business transaction
&V2&.
<ZH>Note</>
If you have not yet carried out <ZH>any</> postings in actual or plan,
you can overwrite the activity type category defined in the activity
type master record <ZH>in planning</>.
This activity type category is then valid for the entire fiscal year in
both actual and plan. Making a change to master data at a later date
affects the <ZH>current</> fiscal year and therefore <ZH>not</> the
current posting.

Error message extract from SAP system. Copyright SAP SE.

BK128 - Details

• The SAP error message BK128 typically indicates that there is an issue with the activity type being used in a business transaction. This error can occur in various contexts, such as during the posting of costs or during the execution of certain transactions in the Controlling (CO) module.
  
  Cause:
  The error message BK128 can be triggered by several factors, including:
  
  Invalid Activity Type: The activity type specified in the transaction is not valid for the business transaction being executed.
  
  Configuration Issues: The activity type may not be properly configured in the system, or it may not be assigned to the relevant cost center or internal order.
  Business Transaction Restrictions: Certain business transactions may have restrictions on which activity types can be used.
  Missing Authorizations: The user may not have the necessary authorizations to use the specified activity type.
  
  
  Solution:
  To resolve the BK128 error, you can take the following steps:
  
  
  Check Activity Type: Verify that the activity type you