Message type: E = Error
Message class:  CKMLDUVN - Inventory differences distribution messages 
Message number: 021
Message text: No entry was found in table T156N for valuation type &1
No subsequent movement type could be found in table T156N for movement
type &v1&. Without this entry, the System can not post the goods
movements required for the distribution. This error is a Customizing
error.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Maintain the subsequent movement type for movement type &v1& in
Customizing for Materials Management ->  <DS:TRAN.OMJJ>Change Movement
Types</>
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CKMLDUVN021 indicates that there is no entry found in the table T156N for the specified valuation type. This error typically occurs in the context of Material Ledger and inventory valuation processes.
Cause: The error is usually caused by one of the following reasons: Missing Configuration: The valuation type specified in the error message is not defined in the T156N table. This table contains the configuration for different valuation types used in the Material Ledger. Incorrect Valuation Type: The valuation type being referenced may be incorrect or not applicable for the material or transaction being processed. Data Inconsistency: There may be inconsistencies in the data or configuration settings related to the Material Ledger.
Solution: To resolve the error, you can take the following steps: Check T156N Table: Use transaction code SE16 or SE16N to access the T156N table. Verify if the valuation type specified in the error message exists in the table. If it does not exist,
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CKMLDUVN020 No data found for the posting of distribution. Processing terminated
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CKMLDUVN019 No changes posted because errors occurred; see message log
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CKMLDUVN022 Total quantity &1 is not the same as quantity difference &2!
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CKMLDUVN023 Distribution to PKOSA only possible for orders with a connection to PKOSA
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.