How To Fix /SCMTMS/GNT_PLN020 - Scheduling not possible for the documents and resources selected

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCMTMS/GNT_PLN -

• Message number: 020

• Message text: Scheduling not possible for the documents and resources selected

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCMTMS/GNT_PLN020 - Scheduling not possible for the documents and resources selected ?

  The SAP error message /SCMTMS/GNT_PLN020 indicates that scheduling is not possible for the selected documents and resources in the SAP Transportation Management (TM) module. This error typically arises during the planning or scheduling process when the system cannot find a feasible way to schedule the transportation activities based on the provided parameters.
  Causes:
  
  Resource Availability: The resources (e.g., vehicles, drivers) required for the transportation are not available during the requested time frame.
  Document Constraints: The documents (e.g., shipments, transportation requests) may have constraints that prevent scheduling, such as time windows, capacity limits, or incompatible transportation modes.
  Planning Parameters: Incorrect or incomplete planning parameters may lead to scheduling issues. This includes missing or incorrect data in the transportation lanes, routes, or master data.
  Capacity Issues: The selected resources may not have enough capacity to handle the load specified in the documents.
  Configuration Issues: There may be configuration issues in the TM settings that affect scheduling, such as incorrect settings for transportation lanes or planning strategies.
  
  Solutions:
  
  Check Resource Availability: Verify that the resources required for the transportation are available during the requested time. Adjust the scheduling or resource allocation as necessary.
  Review Document Constraints: Examine the documents for any constraints that may be causing the scheduling issue. Ensure that time windows and other parameters are set correctly.
  Adjust Planning Parameters: Review and adjust the planning parameters in the TM settings. Ensure that all necessary data is complete and accurate.
  Increase Resource Capacity: If capacity is an issue, consider increasing the capacity of the resources or adjusting the load to fit within the available capacity.
  Consult Configuration Settings: Review the configuration settings in the SAP TM module to ensure that they are set up correctly for your transportation planning needs.
  Use Alternative Resources: If the primary resources are not available, consider using alternative resources that can fulfill the transportation requirements.
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like /SCMTMS/PLN for planning or /SCMTMS/RES for resource management to investigate further.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Refer to the SAP Help Portal for detailed documentation on transportation planning and scheduling in SAP TM.
  Support: If the issue persists, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  By following these steps, you should be able to identify the root cause of the error and implement a suitable solution.