How To Fix WA636 - Type linkage betw.& & and &: Not possible to change rec.type determ. FM &

SAP Error Message - Details

• Message type: E = Error

• Message class: WA - Messages from Workflow Event Manager

• Message number: 636

• Message text: Type linkage betw.& & and &: Not possible to change rec.type determ. FM &

What causes this issue?

The function module which allows a generic receiver type to be
determined dynamically at runtime (receiver type determination function
module) cannot be changed for the specified type linkage between the
object type and event and the specified receiver type.

System Response

The action was terminated, the receiver type determination function
module is not changed.

How to fix this error?

Check whether the specified type linkage exists.
INCLUDE NA_WF-ADMINISTRATOR OBJECT DOKU ID TX

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WA636 - Type linkage betw.& & and &: Not possible to change rec.type determ. FM & ?

  Certainly! Here's a detailed explanation of the SAP error message:
  
  SAP Error Message:
  WA636 Type linkage betw. & and &: Not possible to change rec.type determ. FM &
  
  Meaning / Cause:
  This error occurs when there is an attempt to change the record type determination function module (rec.type determ. FM) for a type linkage between two objects (e.g., between a message type and a process type, or between two object types) in the SAP system, but the system does not allow this change.
  
  Type linkage in SAP refers to the relationship between two object types or message types, which is used in workflow or ALE/IDoc processing.
  The record type determination function module is a function module assigned to determine the record type dynamically during processing.
  Once a type linkage is established with a certain function module for record type determination, SAP does not allow changing this function module for the existing linkage because it could lead to inconsistencies or errors in processing.
  
  
  When does this happen?
  
  When you try to modify an existing type linkage in transaction WE31 (IDoc segments), WE30 (IDoc types), or in workflow customizing.
  When you try to change the function module assigned for record type determination in the type linkage.
  This is a system safeguard to prevent inconsistent or invalid configurations.
  
  
  Solution:
  
  
  Do not change the record type determination FM for an existing type linkage.
  
  
  If you need to change the function module, you have two options:
  
  
  Delete the existing type linkage and recreate it with the new function module.
  
  Be cautious: Deleting type linkages can affect existing configurations and data processing.
  Make sure to check dependencies and impact before deletion.
  
  
  
  Create a new type linkage with the desired function module instead of modifying the existing one.
  
  
  
  
  If you are unsure about the impact, consult with your SAP workflow or ALE/IDoc consultant or BASIS team.
  
  
  Always perform such changes in a development or sandbox system first and test thoroughly before transporting to production.
  
  
  
  Related Information:
  
  
  Transactions involved:
  
  WE31 - IDoc Segment Editor
  WE30 - IDoc Type Development
  SWDD - Workflow Builder (for workflow type linkages)
  BD54 - Distribution Model (for ALE type linkages)
  
  
  
  SAP Notes / Documentation:
  
  Check SAP OSS Notes related to IDoc type linkages and record type determination.
  SAP Help Portal documentation on IDoc and ALE configuration.
  
  
  
  Function Module:
  
  The function module assigned for record type determination is usually a custom or standard FM that returns the record type based on the data.
  
  
  
  
  Summary:
  
  
  
  Aspect
  Description
  
  
  
  
  Error
  WA636: Not possible to change record type determination FM for type linkage
  
  
  Cause
  Attempt to change FM for existing type linkage, which is not allowed
  
  
  Solution
  Delete and recreate the type linkage or create a new one with the desired FM
  
  
  Transactions
  WE31, WE30, SWDD, BD54
  
  
  Precautions
  Test changes in non-production system; check dependencies before deletion
  
  
  
  
  If you provide more context (e.g., which transaction you encountered this in, or what you were trying to do), I can give more tailored advice.