How To Fix DPR_PARTICIPANT502 - Select objects of only one object category

DPR_PARTICIPANT502 - Overview

• Message type: E = Error

• Message class: DPR_PARTICIPANT - Roles: Messages

• Message number: 502

• Message text: Select objects of only one object category

Self-Explanatory Message

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DPR_PARTICIPANT502 - Details

• The SAP error message DPR_PARTICIPANT502, which states "Select objects of only one object category," typically occurs in the context of SAP Project Management or SAP Portfolio and Project Management (PPM). This error indicates that the user is trying to perform an action that requires the selection of objects from a single category, but multiple categories have been selected instead.
  
  Cause:
  The error is caused by selecting multiple objects from different categories when the system expects only one category to be selected. For example, if you are trying to assign participants to a project and you have selected both projects and tasks, the system will throw this error because it cannot process multiple object types simultaneously.
  
  Solution:
  To resolve this error, follow these steps:
  
  
  Review Your Selection: Check the objects you have selected. Ensure that all selected objects belong to the same category (e.g., all should be projects, or all should be tasks).
  
  
  Deselect Unwanted Objects: If