How To Fix WA644 - Type linkage &1-&2 <--> &3 cannot be updated

SAP Error Message - Details

• Message type: E = Error

• Message class: WA - Messages from Workflow Event Manager

• Message number: 644

• Message text: Type linkage &1-&2 <--> &3 cannot be updated

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WA644 - Type linkage &1-&2 <--> &3 cannot be updated ?

  The SAP error message:
  WA644 Type linkage &1-&2 <--> &3 cannot be updated
  typically occurs in the context of type linkages in SAP, especially when dealing with data dictionary objects or table type relationships.
  
  Cause
  This error indicates that the system is trying to update or modify a type linkage between two or more data types (e.g., structures, tables, or data elements), but the update is not allowed or possible due to existing constraints or inconsistencies.
  More specifically:
  
  The linkage between the specified types (&1 and &2) and the type &3 is locked, inconsistent, or not allowed to be changed.
  This can happen if the type linkage is used in active objects or if the system detects that changing the linkage would break dependencies.
  It may also occur if you try to change a type linkage that is part of a standard SAP object or a transport request that is locked.
  Sometimes, the error arises during transport import or when modifying dictionary objects that have dependent objects.
  
  
  Solution
  
  
  Check Dependencies:
  
  Use transaction SE11 (Data Dictionary) to check the involved types and their dependencies.
  Identify if the types are used in other objects (tables, structures, views, or programs).
  Ensure that no active objects depend on the linkage you want to change.
  
  
  
  Unlock or Delete Lock Entries:
  
  If the linkage is locked by a transport or another user, check for locks using SM12 and release them if appropriate.
  Also, check if the transport request containing the linkage is modifiable.
  
  
  
  Adjust or Recreate the Linkage:
  
  If the linkage is inconsistent, try to delete and recreate the linkage properly.
  Sometimes, you may need to delete the dependent objects first, then update the linkage, and recreate the dependent objects.
  
  
  
  Transport Request Issues:
  
  If the error occurs during transport import, check the transport logs.
  Make sure the transport request is not corrupted.
  Re-import or re-create the transport request if necessary.
  
  
  
  SAP Notes and Support:
  
  Search for SAP Notes related to WA644 or type linkage errors.
  Sometimes, SAP provides patches or corrections for known issues.
  
  
  
  
  Related Information
  
  Transaction SE11: Data Dictionary maintenance.
  Transaction SM12: Lock entries management.
  Transport Management: Issues with transport requests can cause linkage update errors.
  SAP Notes: Check SAP Support Portal for notes related to WA644.
  Type Linkage: Refers to the relationship between data types in the ABAP Dictionary, such as foreign key relationships or table type dependencies.
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  WA644 Type linkage &1-&2 <--> &3 cannot be updated
  
  
  Cause
  Attempt to update a type linkage that is locked, inconsistent, or restricted
  
  
  Solution
  Check dependencies, release locks, adjust or recreate linkage, verify transport requests
  
  
  Tools
  SE11, SM12, Transport Management, SAP Notes
  
  
  
  
  If you provide the exact context (e.g., during which transaction or operation the error occurs), I can help you with more specific steps.