How To Fix W8075 - Source and target structures have different numbers of fields (&, &)

SAP Error Message - Details

• Message type: E = Error

• Message class: W8 - Workflow: Expressions, data flow

• Message number: 075

• Message text: Source and target structures have different numbers of fields (&, &)

What causes this issue?

In this binding definition, both the source and the target elements
reference an ABAP Dictionary structure.
As the structures are different (one structure has &v1& fields, the
other &V2&), this binding definition is not possible in this manner.

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?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message W8075 - Source and target structures have different numbers of fields (&, &) ?

  SAP Error Message:
  
  W8075 - Source and target structures have different numbers of fields (&, &)
  
  Cause:
  This warning occurs during data transfer or mapping processes (such as in LSMW, Data Transfer Workbench, or BAPI calls) when the source structure and the target structure involved in the data transfer have a different number of fields. Essentially, the system detects a mismatch in the number of fields between the two structures, which can lead to incomplete or incorrect data mapping.
  
  The first placeholder (&) shows the number of fields in the source structure.
  The second placeholder (&) shows the number of fields in the target structure.
  
  This mismatch can happen due to:
  
  Changes in the structure definitions (e.g., custom fields added or removed).
  Using incorrect or outdated structures in the mapping.
  Incorrect assignment or mapping in the data transfer object.
  Different versions of structures between source and target systems.
  
  
  Solution:
  
  
  Check the Structures:
  
  Compare the source and target structures in SE11 (Data Dictionary) or in the relevant tool.
  Verify the number of fields and their data types.
  
  
  
  Adjust the Mapping:
  
  In the data transfer tool (e.g., LSMW), review the field mapping step.
  Ensure that all fields in the target structure are properly mapped.
  If some fields are not needed, consider removing them or marking them as optional.
  
  
  
  Update Structures:
  
  If the target structure has been changed (e.g., new fields added), update the source structure or the data file accordingly.
  Synchronize the structures if possible.
  
  
  
  Use Conversion Routines or Custom Logic:
  
  If the structures differ intentionally, implement conversion routines or custom code to handle the differences.
  
  
  
  Check for Transport or Version Issues:
  
  Ensure that the correct versions of structures are transported and consistent across systems.
  
  
  
  
  Related Information:
  
  
  Where it occurs:
  
  Commonly seen in LSMW (Legacy System Migration Workbench) during the "Maintain Field Mapping and Conversion Rules" step or during batch input recording playback.
  
  
  SAP Notes:
  
  Check SAP Notes related to LSMW or the specific module you are working with for any known issues or patches.
  
  
  Transaction Codes:  
  
  LSMW - Legacy System Migration Workbench  
  SE11 - Data Dictionary (to check structures)  
  SE37 - Function Builder (if BAPI involved)
  
  
  
  Example:
  
  If the source structure has 10 fields and the target structure has 12 fields, the system will raise W8075 with message:
  
  Source and target structures have different numbers of fields (10, 12)
  
  
  
  Summary:
  W8075 warns you that the source and target structures do not match in field count, which can cause data transfer issues. To resolve it, verify and align the structures and mappings, ensuring all necessary fields are accounted for or handled appropriately.
  
  If you provide the context (e.g., which tool or transaction you encountered this in), I can give more specific guidance.