How To Fix /ECRS/BL_TD126 - You cannot enter a supplementary unit

/ECRS/BL_TD126 - Overview

• Message type: E = Error

• Message class: /ECRS/BL_TD -

• Message number: 126

• Message text: You cannot enter a supplementary unit

Self-Explanatory Message

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/ECRS/BL_TD126 - Details

• The SAP error message /ECRS/BL_TD126 indicates that you cannot enter a supplementary unit for a particular transaction or process. This error typically arises in the context of materials management or inventory management when dealing with units of measure.
  
  Cause:
  
  Unit of Measure Configuration: The primary cause of this error is often related to the configuration of units of measure in the material master. If the supplementary unit of measure is not defined or is not allowed for the specific material, this error will occur.
  Material Type Restrictions: Certain material types may not support supplementary units, leading to this error when trying to enter them.
  Transaction Context: The error may also arise if the transaction you are trying to perform does not support supplementary units, or if the settings for the transaction do not allow for their use.
  
  
  Solution:
  
  
  Check Material Master Data:
  
  Go to the material master record (transaction code MM03).
  Check the units of measure section to