How To Fix /PM0/ABP_TMF_MSG028 - &1: Scheduling &2 to &3 not possible; external or correspondence date

SAP Error Message - Details

• Message type: E = Error

• Message class: /PM0/ABP_TMF_MSG -

• Message number: 028

• Message text: &1: Scheduling &2 to &3 not possible; external or correspondence date

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 /PM0/ABP_TMF_MSG028 - &1: Scheduling &2 to &3 not possible; external or correspondence date ?

  The SAP error message /PM0/ABP_TMF_MSG028 typically indicates that there is an issue with scheduling a task or activity due to constraints related to external or correspondence dates. This error is often encountered in the context of project management or maintenance management within SAP.
  Cause:
  The error message suggests that the scheduling of a task (identified as &2) to a specific date (&3) is not possible due to the following reasons:
  
  External Date Constraints: The task may have external dependencies or constraints that prevent it from being scheduled on the desired date.
  Correspondence Date Issues: There may be a correspondence date that conflicts with the scheduling of the task.
  Configuration Settings: There might be specific configuration settings in the system that restrict scheduling based on certain criteria.
  Resource Availability: The resources required for the task may not be available on the specified date.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check External Dependencies: Review any external dependencies or constraints associated with the task. Ensure that there are no conflicting dates or conditions that would prevent scheduling.
  
  
  Review Correspondence Dates: Check the correspondence dates related to the task. Make sure that they align with the desired scheduling date.
  
  
  Adjust Scheduling Parameters: If applicable, adjust the scheduling parameters in the project or maintenance plan to allow for the desired scheduling.
  
  
  Resource Availability: Verify the availability of resources required for the task on the specified date. If resources are not available, consider rescheduling the task to a date when resources are available.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific details related to the error message and its context.
  
  
  Contact SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support for further assistance.
  
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like IW31 (Create Work Order), IW32 (Change Work Order), or CJ20N (Project Builder) to review and modify the scheduling of tasks.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  User 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 identify the cause of the error and implement a solution to resolve it.