How To Fix RSM449 - No change of the source unit possible with fixed units

RSM449 - Overview

• Message type: E = Error

• Message class: RSM -

• Message number: 449

• Message text: No change of the source unit possible with fixed units

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 RSM449 - No change of the source unit possible with fixed units ?

  The SAP error message RSM449, "No change of the source unit possible with fixed units," typically occurs in the context of SAP's logistics or inventory management modules, particularly when dealing with unit conversions or handling fixed units of measure.
  
  Cause:
  This error arises when you attempt to change the source unit of measure for a material or product that has been defined with fixed units. Fixed units are set in such a way that they cannot be altered or converted to another unit of measure. This is often the case for materials that have specific measurement requirements or regulatory constraints.
  
  Solution:
  To resolve this error, you can consider the following steps:
  
  
  Check Material Master Data:
  
  Go to the material master record (transaction code MM03) and check the unit of measure settings. Ensure that the unit of measure you are trying to change is not set as a fixed unit.
  
  
  
  Review Unit of Measure Settings:
  
  If the unit of