How To Fix ON155 - Redundantly displayed object types were selected

SAP Error Message - Details

• Message type: E = Error

• Message class: ON - Tools in area Object Modeler / Object Editor

• Message number: 155

• Message text: Redundantly displayed object types were selected

What causes this issue?

You have chosen Edit->Select on/off->Redundant object types. On this
and the following screens all object types which appear repeatedly in
the tree and correspond to the selected set will be displayed as
selected.
In addition to this, subtrees may be expanded, so that you can see the
selected redundant object types.

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?

No action is required. This is just for your information.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ON155 - Redundantly displayed object types were selected ?

  The SAP error message ON155, which states "Redundantly displayed object types were selected," typically occurs in the context of object selection in SAP, particularly when dealing with object types in a transaction or report that allows for multiple selections. This error indicates that the user has selected the same object type more than once, which is not allowed.
  Cause:
  The primary cause of this error is the selection of the same object type multiple times in a selection screen or a report. For example, if you are trying to select multiple object types (like different materials, customers, or vendors) and you inadvertently select the same object type more than once, SAP will trigger this error.
  Solution:
  To resolve the ON155 error, follow these steps:
  
  
  Review Your Selections: Go back to the selection screen where you made your selections. Carefully check the list of selected object types.
  
  
  Remove Duplicates: If you find that you have selected the same object type more than once, remove the duplicates. Ensure that each object type is only selected once.
  
  
  Re-run the Transaction: After making the necessary adjustments to your selections, try running the transaction or report again.
  
  
  Check for User Guidance: If you are unsure about the selections, refer to any user documentation or guidelines provided for the specific transaction or report you are using.
  
  
  Related Information:
  
  Transaction Codes: This error can occur in various transactions, such as those related to material management, sales and distribution, or financial accounting.
  SAP Notes: If the issue persists or if you encounter additional problems, consider checking SAP Notes or the SAP Support Portal for any known issues or patches related to the specific transaction you are using.
  User Training: If this error is common among users, consider providing training or documentation to help users understand how to make selections correctly.
  
  By following these steps, you should be able to resolve the ON155 error and proceed with your work in SAP.