How To Fix WW417 - Please only select objects of the same line category in any one step

WW417 - Overview

• Message type: E = Error

• Message class: WW - Material group master maintenance

• Message number: 417

• Message text: Please only select objects of the same line category in any one step

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Only select objects of the same line category in the same step. Using
the UNDO function, you can cancel the current selection. Otherwise,
select an object of the same level.
&Example&
If you have selected materials, you cannot also select material groups
in the same step.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WW417 - Please only select objects of the same line category in any one step ?

  The SAP error message WW417 ("Please only select objects of the same line category in any one step") typically occurs in the context of certain transactions or processes where you are trying to select multiple objects (such as materials, cost centers, or other entities) that belong to different categories or classifications. This error is common in transactions that involve mass processing or selection of items, such as in the Material Management (MM) or Controlling (CO) modules.
  
  Cause:
  The error is triggered when the user attempts to select objects that do not belong to the same line category. For example, if you are trying to process a mix of materials and services in a single step, SAP will not allow this because it requires that all selected items belong to the same category for the operation to be valid.
  
  Solution:
  To resolve this error, you should ensure that all selected objects belong to the same