How To Fix M2688 - Error for self-defined units

M2688 - Overview

• Message type: E = Error

• Message class: M2 - LIS: Generating and updating info structures

• Message number: 688

• Message text: Error for self-defined units

What causes this issue?

In a communication structure, two or more units are not allowed to use
the same data element.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M2688 - Error for self-defined units ?

  The SAP error message M2688 typically indicates an issue related to self-defined units of measure in the system. This error can occur when there is a problem with the configuration or usage of custom units of measure in material management or inventory processes.
  
  Cause:
  
  Incorrect Configuration: The self-defined unit of measure may not be properly configured in the system. This includes issues with the unit's definition, conversion factors, or its assignment to materials.
  Missing Master Data: The material master data may not have the necessary information related to the custom unit of measure.
  Inconsistent Data: There may be inconsistencies in the data related to the unit of measure, such as missing entries in the unit of measure tables.
  Usage in Transactions: The custom unit of measure may be used in transactions where it is not valid or not allowed.
  
  
  Solution:
  
  
  Check Configuration:
  
  Go to the configuration settings for units of measure in SAP (Transaction Code: OME1 for defining