How To Fix 28473 - ...in constraint: &1 in net &2

SAP Error Message - Details

• Message type: E = Error

• Message class: 28 - Configuration

• Message number: 473

• Message text: ...in constraint: &1 in net &2

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message 28473 - ...in constraint: &1 in net &2 ?

  The SAP error message 28473 typically relates to issues with constraints in the context of network planning or project management within SAP systems, particularly in the Project System (PS) module or related areas. The message indicates that there is a problem with a specific constraint in a network or project.
  Cause:
  The error message "28473 ...in constraint: &1 in net &2" usually arises due to one of the following reasons:
  
  
  Invalid Constraints: The constraint specified (represented by &1) is not valid for the network (represented by &2). This could be due to incorrect dates, dependencies, or relationships between activities.
  
  
  Missing Data: Required data for the constraint or network might be missing or incorrectly configured.
  
  
  Inconsistent Data: There may be inconsistencies in the data related to the network or project, such as overlapping dates or conflicting constraints.
  
  
  Configuration Issues: There could be issues with the configuration of the project or network settings that prevent the system from processing the constraints correctly.
  
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Constraints: Review the constraints associated with the network. Ensure that they are valid and correctly defined. Look for any discrepancies in dates or relationships.
  
  
  Validate Network Data: Ensure that all necessary data for the network is complete and accurate. This includes checking for missing activities, dates, and dependencies.
  
  
  Review Project Settings: Check the configuration settings for the project or network. Ensure that they align with the requirements of the project and that there are no conflicting settings.
  
  
  Use Transaction Codes: Utilize relevant transaction codes such as CN22 (Change Network) or CJ20N (Project Builder) to review and modify the network and its constraints.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on the error message and its context.
  
  
  Seek Support: If the issue persists, consider reaching out to your SAP support team or consulting with an SAP expert who can provide more tailored assistance based on your specific configuration and setup.
  
  
  Related Information:
  
  SAP Notes: Check for any SAP Notes related to error message 28473, as they may provide additional insights or patches that address known issues.
  Transaction Codes: Familiarize yourself with relevant transaction codes in the Project System module, as they can help you navigate and troubleshoot issues effectively.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, providing insights or solutions from other users' experiences.
  
  By following these steps, you should be able to identify and resolve the underlying cause of the error message 28473 in your SAP system.