How To Fix MM138 - You cannot maintain customs tariff preference data here

MM138 - Overview

• Message type: E = Error

• Message class: MM - Messages for material master maintenance and Customizing

• Message number: 138

• Message text: You cannot maintain customs tariff preference data here

What causes this issue?

You wanted to maintain customs tariff preference data. However, this is
not possible in the following cases:
When scheduling the creation or changing of a material
If you have not specified a plant
If you have not selected a view for the user department
<LS>Purchasing</> or <LS>Sales</>

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?

Check and supplement your data as required.

Error message extract from SAP system. Copyright SAP SE.

MM138 - Details

• The SAP error message MM138, which states "You cannot maintain customs tariff preference data here," typically occurs in the context of managing customs and trade compliance data within the Materials Management (MM) module. This error indicates that the system does not allow you to maintain or edit customs tariff preference data in the current transaction or screen you are using.
  
  Cause:
  
  Transaction Context: The error often arises when you are trying to maintain customs tariff preference data in a transaction that does not support it. For example, you might be in a transaction meant for material master data maintenance but not in the appropriate view or tab for customs data.
  Authorization Issues: You may not have the necessary authorizations to maintain customs tariff preference data.
  Configuration Settings: The system configuration may restrict the maintenance of customs tariff preference data in certain scenarios or for specific materials.
  
  
  Solution:
  
  Check Transaction: Ensure that you are in the correct