How To Fix WA634 - Type linkage between & & and &: Insertion not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: WA - Messages from Workflow Event Manager

• Message number: 634

• Message text: Type linkage between & & and &: Insertion not possible

What causes this issue?

The specified type linkage between object type and event and the
specified receiver type cannot be entered.

System Response

The action was terminated. The entry was not made.

How to fix this error?

Check the contents of the type linkage table using the transaction
<ds:TRAN.SWETYPV>Maintain type linkage table</>. If necessary, enter
the missing type linkage.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WA634 - Type linkage between & & and &: Insertion not possible ?

  Certainly! Here's a detailed explanation of the SAP error message:
  
  SAP Error Message:
  WA634 Type linkage between & & and &: Insertion not possible
  
  Cause:
  This error occurs during the modification or enhancement of SAP dictionary objects (like tables, structures, or views) when there is an attempt to insert a new field or change the structure in a way that violates the existing type linkage rules.
  Type linkage in SAP means that certain dictionary objects are linked to each other by reference or inheritance. For example, a structure might be linked to a table type or another structure. When you try to insert a new component (field) into one of these linked types, the system checks if the insertion is consistent with the linked types.
  The error indicates that the insertion of a new field or modification is not possible because it would break the type linkage between the involved dictionary objects.
  
  Typical Scenarios:
  
  You try to insert a new field into a structure or table that is linked to another structure or table type.
  You try to modify a data element or domain that is used in linked types.
  You attempt to insert a field in a structure that is used as a component in another structure or table type, and the insertion would break the consistency.
  
  
  Solution:
  
  
  Check the Type Linkage:
  
  Identify the involved dictionary objects mentioned in the error message (the placeholders & & & will be replaced by actual object names).
  Use transaction SE11 to check the relationships between these objects.
  
  
  
  Modify the Linked Types Consistently:
  
  If you want to insert a field, you must ensure that all linked types are modified consistently.
  For example, if Structure A is linked to Structure B, and you want to insert a field in Structure A, you may also need to insert the corresponding field in Structure B or adjust the linkage accordingly.
  
  
  
  Use Append Structures:
  
  Instead of inserting fields directly into standard SAP tables or structures, use append structures to add custom fields. This avoids breaking type linkages.
  Append structures are designed to extend SAP standard dictionary objects without modifying the original object.
  
  
  
  Check for Inheritance or Reference:
  
  If the type linkage is due to inheritance or reference, ensure that the insertion respects the inheritance hierarchy.
  Sometimes, you may need to redefine or adjust the inheritance.
  
  
  
  Transport and Activation:
  
  After making consistent changes, activate the dictionary objects.
  Ensure that the transport requests are properly managed.
  
  
  
  
  Related Information:
  
  Transaction SE11: Dictionary maintenance tool to check and modify tables, structures, and types.
  Append Structures: Recommended way to add fields to SAP standard tables without modifying the original object.
  Type Linkage: A concept in SAP dictionary where types are linked by reference or inheritance, ensuring consistency.
  SAP Notes: Sometimes SAP releases notes related to specific dictionary object modifications and type linkage issues.
  Debugging: You can debug the activation process to see exactly where the insertion fails.
  
  
  Summary:
  
  Cause: Attempt to insert a field into linked dictionary objects violating type linkage rules.
  Solution: Modify all linked types consistently or use append structures to extend standard objects.
  Check: Use SE11 to analyze type linkage and ensure consistent changes.
  
  
  If you provide the actual object names from the error message, I can help you with more specific guidance.