How To Fix 1X055 - The structure type could not be activated

1X055 - Overview

• Message type: E = Error

• Message class: 1X - General hierarchy maintenance tool message

• Message number: 055

• Message text: The structure type could not be activated

What causes this issue?

A structure type can only be activated when all node types assigned
exist and are active.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

1X055 - Details

• The SAP error message 1X055: "The structure type could not be activated" typically occurs when there are issues with the definition of a structure in the ABAP Dictionary. This error can arise due to various reasons, including inconsistencies in the structure definition, missing components, or issues with the underlying database.
  Causes:
  
  Inconsistent Structure Definition: The structure may have inconsistencies, such as incorrect data types or lengths.
  Missing Components: If the structure references other data elements or types that are not defined or activated, it can lead to this error.
  Database Issues: Problems with the underlying database, such as missing tables or fields, can also trigger this error.
  Transport Issues: If the structure was transported from another system and there were issues during the transport, it may not activate correctly.
  Authorization Issues: Lack of proper authorizations to activate the structure can also lead to this error.
  
  Solutions:
  
  
  Check Structure Definition:
  
  Go to the ABAP Dictionary (transaction SE11) and check the