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Warning message BK128 in material costing

Hi SAP Community,

I am trying to run the materil planned costing (transaction CK11N), but system give me the warning message BK128 - "Activity type XXXXX is not allowed for business transaction RKL".

I checked the activity type master data and I've changed the value in the actual activity type category, but the warning message is still showed. Can you tell me what I have to do to solve this problem

Activity type HHFIX is not allowed for business transaction RKL

Message no. BK128


In business transaction RKL you entered activity type HHFIX, category 5. This category is not allowed in business transaction RKL.

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:

RKL (Direct Activity Allocation):

Category 1 (manual entry, manual allocation)

RKN, RKIL (Indirect Activity Allocation):

Category 3 (manual entry, indirect allocation)

Category 4 (manual entry, no allocation)

RKLT (Template Allocation Actual):

Category 1 (manual entry, manual allocation)

Category 2 (indirect calculation, indirect allocation)

RKPS (Template Allocation Plan):

Category 1 (manual entry, manual allocation)

Category 2 (indirect calculation, indirect allocation)


You can post category 2 (indirect calculation, indirect allocation) and

category 5 (calculation and allocation using target=actual activity allocation) activity types

manually only if the indicator 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.


Enter an activity type with a category valid for business transaction RKL.


If you have not yet carried out any postings in actual or plan, you can overwrite the activity type category defined in the activity type master record 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 current fiscal year and therefore not the current posting.

Thanks and Regards,

Daniel Scoz.

Former Member
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