How To Fix /SAPAPO/OM_ERROR303 - Successor activity is a dummy activity

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/OM_ERROR -

• Message number: 303

• Message text: Successor activity is a dummy activity

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/OM_ERROR303 - Successor activity is a dummy activity ?

  The SAP error message /SAPAPO/OM_ERROR303 indicates that there is an issue with a successor activity in the context of Advanced Planning and Optimization (APO) within SAP. Specifically, the error states that the successor activity is a "dummy activity." This typically means that the activity in question does not have any meaningful operations or tasks associated with it, which can disrupt the planning process.
  Cause:
  
  
  Dummy Activity Definition: In SAP APO, a dummy activity is often used as a placeholder in a network or project. It does not perform any actual work or consume resources. If a successor activity is defined as a dummy, it cannot be linked to other activities that require actual processing.
  
  
  Incorrect Activity Configuration: The configuration of the activities in the planning model may be incorrect, leading to the identification of a successor as a dummy.
  
  
  Planning Sequence Issues: The planning sequence may not be properly defined, causing the system to misinterpret the relationships between activities.
  
  
  Solution:
  
  
  Review Activity Configuration: Check the configuration of the activities in the planning model. Ensure that the successor activity is not set as a dummy unless it is intended to be so. If it is mistakenly marked as a dummy, update its configuration to reflect the correct status.
  
  
  Adjust Planning Sequences: Review the planning sequences and dependencies between activities. Ensure that all activities are properly linked and that there are no unintended dummy activities in the sequence.
  
  
  Use Valid Successor Activities: Ensure that the successor activity you are trying to link to is a valid activity that can perform operations. If necessary, create a new activity that meets the requirements.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for guidance on how to properly configure activities and resolve issues related to dummy activities.
  
  
  Testing: After making changes, test the planning process to ensure that the error does not recur and that the activities are functioning as expected.
  
  
  Related Information:
  
  SAP APO Documentation: Review the official SAP documentation for Advanced Planning and Optimization to understand the concepts of activities, networks, and planning sequences.
  SAP Community Forums: Engage with the SAP community forums for insights and solutions from other users who may have encountered similar issues.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.