How To Fix CR403 - Mixed resource cannot be selected when advanced planning is selected

SAP Error Message - Details

• Message type: E = Error

• Message class: CR - (1,099) Work Center; (100,200) Capacity

• Message number: 403

• Message text: Mixed resource cannot be selected when advanced planning is selected

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CR403 - Mixed resource cannot be selected when advanced planning is selected ?

  The SAP error message CR403 ("Mixed resource cannot be selected when advanced planning is selected") typically occurs in the context of SAP Advanced Planning and Optimization (APO) or SAP S/4HANA when trying to plan or schedule production using a resource that is defined as a mixed resource. Mixed resources are those that can handle multiple product types or variants, but they may not be compatible with certain advanced planning functionalities.
  Cause:
  The error arises when:
  
  Mixed Resource Configuration: The resource you are trying to use is configured as a mixed resource, which means it can handle different products but is not compatible with the advanced planning features you are trying to use.
  Planning Strategy: The planning strategy or method you are using may not support mixed resources in the context of advanced planning.
  Resource Selection: The system is attempting to select a mixed resource for a planning operation that requires a dedicated resource.
  
  Solution:
  To resolve the CR403 error, consider the following steps:
  
  
  Check Resource Configuration:
  
  Review the configuration of the resource in the SAP system. Ensure that it is set up correctly for the type of planning you are performing.
  If the resource is intended to be used in advanced planning, consider changing its configuration to a dedicated resource if applicable.
  
  
  
  Adjust Planning Parameters:
  
  Review the planning parameters and strategies being used. Ensure that they are compatible with mixed resources.
  If you are using a planning strategy that does not support mixed resources, consider switching to a different strategy that does.
  
  
  
  Resource Selection:
  
  If possible, select a dedicated resource instead of a mixed resource for the planning operation you are attempting.
  Ensure that the resource selection criteria in your planning run do not inadvertently include mixed resources.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidelines on using mixed resources in advanced planning scenarios.
  Check for any notes or updates from SAP that may address this issue.
  
  
  
  Testing:
  
  After making changes, perform a test run to ensure that the error does not occur again and that the planning process completes successfully.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered and resolved similar issues.
  Training and Documentation: Consider reviewing training materials or documentation related to resource planning in SAP APO or S/4HANA to better understand the implications of using mixed resources.
  
  By following these steps, you should be able to address the CR403 error and successfully proceed with your advanced planning activities in SAP.