How To Fix GHO_NET081 - Links cannot be created between start and end nodes

SAP Error Message - Details

• Message type: E = Error

• Message class: GHO_NET - Message class for Production Network Modelling

• Message number: 081

• Message text: Links cannot be created between start and end nodes

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message GHO_NET081 - Links cannot be created between start and end nodes ?

  The SAP error message GHO_NET081, which states "Links cannot be created between start and end nodes," typically occurs in the context of SAP's project management or network planning functionalities, such as in the Project System (PS) or Production Planning (PP) modules. This error indicates that there is an issue with the way the nodes (activities or tasks) are being linked in a network diagram or project plan.
  Cause:
  
  
  Incorrect Node Type: The error often arises when trying to create a link between incompatible node types. For example, you may be trying to link a start node (which is usually the beginning of a process) directly to an end node (which signifies the completion of a process) without any intermediate activities.
  
  
  Missing Intermediate Activities: The linking logic in project management typically requires that there are intermediate activities between the start and end nodes. If there are no such activities, the system will not allow the creation of a direct link.
  
  
  Network Structure Issues: There may be structural issues in the network that violate the rules of how nodes can be connected. This could include circular dependencies or incorrect sequencing of tasks.
  
  
  Configuration Issues: Sometimes, the configuration settings in the SAP system may not allow certain types of links to be created due to business rules or constraints.
  
  
  Solution:
  
  
  Check Node Types: Ensure that you are linking compatible node types. Verify that you are not trying to link a start node directly to an end node without any intermediate activities.
  
  
  Add Intermediate Activities: If you need to link a start node to an end node, make sure to include the necessary intermediate activities in between. This will create a valid path for the link.
  
  
  Review Network Structure: Examine the overall structure of your network to ensure that it adheres to the required linking rules. Look for any circular dependencies or incorrect sequences that may be causing the issue.
  
  
  Consult Configuration Settings: If the problem persists, check the configuration settings in your SAP system. There may be specific rules or constraints that need to be adjusted to allow the creation of the desired links.
  
  
  Use Transaction Codes: Utilize relevant transaction codes (like CN22 for network maintenance) to review and modify the network structure as needed.
  
  
  Documentation and Help: Refer to SAP documentation or help resources for guidance on network planning and linking nodes. You may also consider reaching out to your SAP support team for assistance.
  
  
  Related Information:
  
  SAP Notes: Check for any SAP Notes related to GHO_NET081 for additional insights or patches that may address the issue.
  Training and Documentation: Familiarize yourself with SAP's project management and network planning functionalities through training materials or user guides.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to resolve the GHO_NET081 error and successfully create the necessary links in your SAP project or network planning activities.