How To Fix TFC0743 - Predecessor &1 cannot be created

SAP Error Message - Details

• Message type: E = Error

• Message class: TFC0 - Messages in FC

• Message number: 743

• Message text: Predecessor &1 cannot be created

What causes this issue?

You want to define a dependency between tasks. In this process, the
system checks the start time of the tasks: The preceding task must start
before the successor task. However, this is not the case with the
dependency that you have defined.

System Response

Such dependencies are not permitted.

How to fix this error?

Change the offset or the start time of the tasks.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TFC0743 - Predecessor &1 cannot be created ?

  The SAP error message TFC0743, which states "Predecessor &1 cannot be created," typically occurs in the context of project management or production planning within SAP. This error indicates that there is an issue with creating a predecessor relationship for a task or activity in a project or production order.
  Causes:
  
  Invalid Predecessor: The predecessor task or activity specified does not exist or is not valid in the current context.
  Incorrect Status: The predecessor task may be in a status that does not allow for new relationships to be created (e.g., it may be completed or closed).
  Missing Data: Required data for the predecessor task may be missing or incomplete, preventing the creation of the relationship.
  Configuration Issues: There may be configuration settings in the project management or production planning module that are not set up correctly.
  Dependency Rules: The system may have rules or constraints that prevent the creation of the predecessor relationship based on the current project or order settings.
  
  Solutions:
  
  Verify Predecessor: Check if the predecessor task or activity exists and is valid. Ensure that you are using the correct identifier for the predecessor.
  Check Status: Review the status of the predecessor task. If it is not in a suitable status for creating relationships, you may need to change its status or create the relationship at a different time.
  Complete Required Data: Ensure that all necessary data for the predecessor task is filled out correctly. This may include dates, resources, or other relevant information.
  Review Configuration: Consult with your SAP administrator or configuration team to ensure that the project management or production planning settings are correctly configured.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on managing predecessor relationships in your version of SAP.
  Error Logs: Check system logs for additional error messages or warnings that may provide more context about the issue.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder) or CO02 (Change Production Order) where you might encounter this error.
  SAP Notes: Search for SAP Notes related to TFC0743 for any patches or updates that may address this issue.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed and resolved.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.