How To Fix OM135 - Source and target selection identical

SAP Error Message - Details

• Message type: E = Error

• Message class: OM - Customizing Materialwirtschaft

• Message number: 135

• Message text: Source and target selection identical

What causes this issue?

Source and target selections of the copy process must differ from one
another.
Entries in the source fields "Account grouping", "Valuation class" and
"G/L account" without entries in the corresponding target fields only
have the effect of delimiting the selection of source data. They do not
distinguish the source selection from the target selection.

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?

Please define a target selection that differs from the source selection
in at least one selection field.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OM135 - Source and target selection identical ?

  The SAP error message OM135 ("Source and target selection identical") typically occurs in the context of configuration or data transfer processes, particularly when dealing with the assignment of characteristics or values in SAP's configuration modules, such as in the areas of production planning or material management.
  Cause:
  The error arises when the source and target selections in a configuration or data transfer process are the same. This means that the system is trying to copy or transfer data from a source to a target that are identical, which is not a valid operation. For example, if you are trying to assign a characteristic to a material and mistakenly select the same characteristic for both the source and target, the system will throw this error.
  Solution:
  To resolve the OM135 error, follow these steps:
  
  
  Review Selections: Check the source and target selections in your configuration or data transfer process. Ensure that they are not identical. You may need to change either the source or the target to a different selection.
  
  
  Correct Configuration: If you are working in a configuration area (like variant configuration), ensure that the characteristics and values you are trying to assign are correctly set up and that you are not inadvertently selecting the same item for both source and target.
  
  
  Data Transfer Process: If this error occurs during a data transfer process, verify the mapping of fields. Ensure that the source and target fields are distinct and correctly defined.
  
  
  Consult Documentation: If you are unsure about the correct selections, refer to SAP documentation or help resources related to the specific module you are working with.
  
  
  Testing: After making the necessary changes, test the process again to ensure that the error has been resolved.
  
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may be using specific transaction codes (like OMJJ for inventory management or CU01 for configuration) that could be relevant to the error.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. Sometimes, there may be specific fixes or updates provided by SAP.
  User Forums: Consider visiting SAP community forums or user groups where similar issues may have been discussed. Other users may have encountered the same error and can provide insights or solutions.
  
  By following these steps, you should be able to identify the cause of the OM135 error and implement a solution to resolve it.