How To Fix ON156 - Selections of redundantly selected object types were removed

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 156

• Message text: Selections of redundantly selected object types were removed

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
normal, that is not selected.

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 ON156 - Selections of redundantly selected object types were removed ?

  The SAP error message ON156, which states "Selections of redundantly selected object types were removed," typically occurs in the context of reporting or data selection processes within SAP, particularly when dealing with object selections in reports or queries.
  Cause:
  This error message is triggered when there are redundant selections of object types in your query or report. For example, if you have selected the same object type multiple times or if there are conflicting selections that SAP cannot process simultaneously, the system will automatically remove the redundant selections to avoid confusion or errors in data retrieval.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review Selections: Go through the selection criteria in your report or query. Look for any duplicate entries or conflicting selections. Ensure that each object type is selected only once.
  
  
  Simplify Selections: If you have complex selection criteria, try to simplify them. Remove any unnecessary filters or conditions that may lead to redundancy.
  
  
  Check for Conflicts: Ensure that the selections do not conflict with each other. For example, if you are selecting a range of values for one object type, make sure it does not contradict another selection for the same object type.
  
  
  Test Incrementally: If you are unsure which selection is causing the issue, try running the report with fewer selections and gradually add them back in until you identify the problematic one.
  
  
  Consult Documentation: If you are using a specific SAP module or report, refer to the relevant SAP documentation or help resources for guidance on proper selection criteria.
  
  
  Seek Help from SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. Sometimes, there may be specific fixes or updates that address this issue.
  Transaction Codes: Familiarize yourself with relevant transaction codes that may help you analyze or modify your selections, such as SE38 (ABAP Editor) or SQ01 (SAP Query).
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to resolve the ON156 error and successfully run your report or query without redundant selections.