How To Fix EP301 - No activity categories are assigned for allocation to reversal transact.

EP301 - Overview

• Message type: E = Error

• Message class: EP - Messages for Posting Area

• Message number: 301

• Message text: No activity categories are assigned for allocation to reversal transact.

What causes this issue?

No activity categories have been assigned to the reversal category in
the Customizing settings for reversals.

How to fix this error?

Assign activity categories to the reversal category in Customizing.

Error message extract from SAP system. Copyright SAP SE.

EP301 - Details

• The SAP error message EP301 ("No activity categories are assigned for allocation to reversal transaction") typically occurs in the context of SAP's Controlling (CO) module, particularly when dealing with internal orders or cost allocations. This error indicates that the system cannot find any activity categories assigned to the relevant allocation or reversal transaction.
  
  Cause:
  
  Missing Activity Categories: The primary cause of this error is that there are no activity categories assigned to the relevant internal order or cost center for the transaction you are trying to execute.
  
  Configuration Issues: There may be configuration issues in the controlling area or the specific internal order type that prevent the assignment of activity categories.
  Transaction Type: The transaction type being used may not be configured to allow for the allocation of costs or activities.
  
  
  Solution:
  
  
  Check Activity Category Assignment:
  
  Go to the configuration settings in SAP (Transaction code: SPRO).
  Navigate to Controlling > Internal Orders > Order Master Data > Define