How To Fix C4023 - & does not allow another unit

SAP Error Message - Details

• Message type: E = Error

• Message class: C4 - CTMS_SYNTAX_CHECK

• Message number: 023

• Message text: & does not allow another unit

What causes this issue?

The unit of measure for the characteristic cannot be converted into the
unit of measure you entered. The unit of measure for the characteristic
and the unit of measure you entered cannot be converted into other
units of measure. Settings in the IMG determine whether alternative
units can be entered.

System Response

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

How to fix this error?

Enter the unit of measure defined in characteristics maintenance for
the characteristic, or enter a unit that can be converted into the unit
for the characteristic.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message C4023 - & does not allow another unit ?

  The SAP error message C4023 typically indicates an issue related to the handling of units of measure in the system. This error often arises when there is an attempt to perform an operation that involves a unit of measure that is not compatible with the expected units in the system. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Unit of Measure Mismatch: The error usually occurs when there is a mismatch between the unit of measure defined in the material master and the unit of measure being used in the transaction.
  Incorrect Configuration: The configuration settings for units of measure in the material master or in the relevant transaction may not be set up correctly.
  Conversion Issues: If there are conversion factors defined between different units of measure, and they are not set up correctly, this can lead to the error.
  Stock Type Restrictions: The error may also occur if there are restrictions on the stock type that prevent the use of certain units of measure.
  
  Solution:
  
  
  Check Material Master: Verify the unit of measure settings in the material master record. Ensure that the base unit of measure and any alternative units of measure are correctly defined.
  
  Transaction Code: MM03 (Display Material)
  
  
  
  Review Transaction Data: Check the transaction data you are trying to process. Ensure that the unit of measure being used is valid for the material in question.
  
  
  Adjust Configuration: If necessary, adjust the configuration settings for units of measure in the system. This may involve checking the settings in the customizing transaction (SPRO) under Material Management.
  
  
  Conversion Factors: If you are using multiple units of measure, ensure that the conversion factors are correctly defined and that they make sense for the materials involved.
  
  
  Stock Type Settings: Review the stock type settings to ensure that there are no restrictions that would prevent the use of the specified unit of measure.
  
  
  Consult Documentation: If the issue persists, consult SAP documentation or reach out to your SAP support team for further assistance.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  User Forums: Consider searching SAP community forums or other user groups for similar issues and solutions shared by other users.
  Testing: After making changes, perform tests to ensure that the error is resolved and that the system behaves as expected.
  
  By following these steps, you should be able to identify the cause of the C4023 error and implement a solution to resolve it.