How To Fix M2456 - Conversion from source unit & to unit & not allowed

M2456 - Overview

• Message type: E = Error

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

• Message number: 456

• Message text: Conversion from source unit & to unit & not allowed

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message M2456 - Conversion from source unit & to unit & not allowed ?

  The SAP error message M2456, which states "Conversion from source unit & to unit & not allowed," typically occurs in the context of unit of measure (UoM) conversions in materials management or inventory management processes. This error indicates that the system is unable to convert a quantity from one unit of measure to another due to a lack of defined conversion factors or incompatible units.
  Causes:
  
  Missing Conversion Factors: The most common cause is that the conversion factors between the source unit and the target unit have not been defined in the system.
  Incompatible Units: The units may not be compatible for conversion. For example, trying to convert between weight and volume without a defined relationship.
  Incorrect Unit of Measure: The unit of measure used may not be valid or recognized in the context of the material or transaction.
  
  Configuration Issues: There may be issues in the configuration of the material master or the unit