How To Fix WLC_PARALLEL027 - The field type &1 is not compatible with field &2

SAP Error Message - Details

• Message type: E = Error

• Message class: WLC_PARALLEL - Load Distribution and External Parallel Processing

• Message number: 027

• Message text: The field type &1 is not compatible with field &2

What causes this issue?

Selected table &v3& does not contain field &v1& of the selection option
to be filled. The values of field &v2&, used to estimate the workload,
cannot be used to distribute the workload among the parallel jobs,
because the values are not compatible (neither the same data element
nor the same domain, nor the same internal data type with the same
length and number of decimal places).
The system could not find a field in the primary or secondary tables
whose values could be copied to the selection options to be filled.

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?

If you cannot define another generic preselection with the notes in the
<DS:RE.RWLC_PROCESS_IN_PARALLEL>Documentation</>, you must carry out
the selection yourself using a function module.
This message should not appear again, because the functionality has been
enhanced so that only this field is selected in this case.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WLC_PARALLEL027 - The field type &1 is not compatible with field &2 ?

  The SAP error message WLC_PARALLEL027 indicates that there is a type mismatch between two fields in a parallel processing scenario. Specifically, it suggests that the field type of one variable (denoted as &1) is not compatible with the expected field type of another variable (denoted as &2). This error typically arises in the context of data processing, especially when dealing with parallel processing in SAP systems.
  Cause
  The error can occur due to several reasons:
  
  Data Type Mismatch: The most common cause is that the data types of the fields being compared or processed are not compatible. For example, trying to assign a string value to a numeric field.
  Incorrect Field Mapping: If fields are incorrectly mapped in a data processing routine or function module, this error can arise.
  Changes in Data Structure: If there have been recent changes to the data structure (like a table or a structure definition), and the code has not been updated accordingly, it can lead to this error.
  Parallel Processing Logic: In parallel processing scenarios, if the logic for handling data types is not correctly implemented, it can lead to this error.
  
  Solution
  To resolve the error, you can take the following steps:
  
  
  Check Data Types: Review the data types of the fields involved in the operation. Ensure that they are compatible. You can do this by checking the data dictionary (SE11) for the relevant tables or structures.
  
  
  Review Field Mapping: If you are using a custom program or function module, check the field mapping logic to ensure that the correct fields are being used and that they match in terms of data type.
  
  
  Debugging: Use the debugger to step through the code where the error occurs. This can help you identify the exact point of failure and the values being processed.
  
  
  Update Code: If there have been changes to the data structure, update your code to reflect these changes. Ensure that any data type conversions are handled appropriately.
  
  
  Consult Documentation: If you are using standard SAP functionality, consult the relevant SAP documentation or notes for any known issues or updates related to the error.
  
  
  Testing: After making changes, thoroughly test the functionality to ensure that the error is resolved and that no new issues have been introduced.
  
  
  Related Information
  
  Transaction Codes: You may want to use transaction codes like SE11 (Data Dictionary), SE80 (Object Navigator), or SE37 (Function Module) to investigate the data structures and function modules involved.
  SAP Notes: Check SAP Notes for any specific notes related to this error message. SAP frequently updates its knowledge base with solutions for common issues.
  Parallel Processing: Familiarize yourself with how parallel processing works in SAP, especially if you are working with background jobs or parallelized reports.
  
  By following these steps, you should be able to identify and resolve the cause of the WLC_PARALLEL027 error in your SAP system.