How To Fix MPE_OAN061 - Predecessor &1 does not exist in the operation activity network

MPE_OAN061 - Overview

• Message type: E = Error

• Message class: MPE_OAN - Operation Activity Network Messages

• Message number: 061

• Message text: Predecessor &1 does not exist in the operation activity network

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MPE_OAN061 - Predecessor &1 does not exist in the operation activity network ?

  The SAP error message MPE_OAN061 indicates that there is a problem with the operation activity network in a project or production order. Specifically, it means that a predecessor operation that is expected to exist does not exist in the network. This can occur in various scenarios, such as when you are trying to create or modify an operation in a project or production order.
  
  Cause:
  
  Missing Predecessor: The predecessor operation that is referenced does not exist in the operation activity network. This could be due to a deletion or an incorrect reference.
  Incorrect Configuration: The operation might be incorrectly configured, leading to a reference to a non-existent predecessor.
  Data Inconsistency: There may be inconsistencies in the data, such as missing entries in the database or issues with the project structure.
  Incorrect Order of Operations: The operation might be trying to reference a predecessor that is not defined in the correct sequence.
  
  
  Solution:
  
  Check Operation Network: Verify the