How To Fix CKMLDUVN601 - Materials and activities cannot be processed at the same time

CKMLDUVN601 - Overview

• Message type: E = Error

• Message class: CKMLDUVN - Inventory differences distribution messages

• Message number: 601

• Message text: Materials and activities cannot be processed at the same time

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CKMLDUVN601 - Materials and activities cannot be processed at the same time ?

  The SAP error message CKMLDUVN601, which states "Materials and activities cannot be processed at the same time," typically occurs in the context of the Material Ledger during the process of executing a material valuation or during the closing of a period. This error indicates that there is a conflict in the processing of materials and activities, which cannot be handled simultaneously.
  
  Cause:
  
  Simultaneous Processing: The error usually arises when there is an attempt to process both material movements and activity allocations at the same time. This can happen if you are trying to execute a transaction that involves both materials and activities in a way that is not allowed by the system.
  
  Configuration Issues: There may be configuration settings in the Material Ledger or in the controlling module that are not aligned, leading to this error.
  Open Periods: If there are open periods for both materials and activities, the system may not allow processing