How To Fix /SCMTMS/TOR355 - Item with category &1 cannot be subitem of item with category &2

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCMTMS/TOR -

• Message number: 355

• Message text: Item with category &1 cannot be subitem of item with category &2

Self-Explanatory Message

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• What is the cause and solution for SAP error message /SCMTMS/TOR355 - Item with category &1 cannot be subitem of item with category &2 ?

  The SAP error message /SCMTMS/TOR355 Item with category &1 cannot be subitem of item with category &2 typically occurs in the context of SAP Transportation Management (TM). This error indicates that there is an issue with the hierarchical relationship between items in a transportation order or a similar document. Specifically, it suggests that the item you are trying to define as a subitem does not have a compatible category with the parent item.
  Cause:
  
  Incompatible Item Categories: The item you are trying to set as a subitem has a different category than the parent item. In SAP TM, certain item categories are not allowed to be nested under others due to business logic or configuration settings.
  Configuration Issues: The configuration settings in the system may not allow certain combinations of item categories to exist in a parent-child relationship.
  Data Entry Errors: There may be a mistake in how the items were defined or entered into the system, leading to this incompatibility.
  
  Solution:
  
  Check Item Categories: Review the item categories of both the parent and subitem. Ensure that the subitem's category is compatible with the parent item's category. You may need to refer to the documentation or configuration settings to understand which categories can be nested.
  Adjust Item Definitions: If the item categories are indeed incompatible, you may need to change the category of the subitem or the parent item to ensure they align correctly.
  Consult Configuration: If you are unsure about the allowed item categories, consult with your SAP TM configuration team or refer to the customizing settings in the system. They can provide insights into the allowed relationships between item categories.
  Review Documentation: Check SAP documentation or notes related to item categories in TM for any specific rules or guidelines that may apply to your scenario.
  
  Related Information:
  
  SAP Notes: Look for any relevant SAP Notes that might address this specific error or provide additional context.
  Transaction Codes: Use transaction codes like /SCMTMS/TOR to access transportation orders and review the item details.
  Customizing Settings: Review the customizing settings for item categories in SAP TM, which can be found under the relevant configuration path in SPRO.
  Testing: If changes are made, test the scenario in a development or quality environment before applying changes to production.
  
  By following these steps, you should be able to resolve the error and ensure that your transportation order items are correctly defined.