How To Fix /SAPAPO/CTM1305 - No suitable source of supply was found due to the lot size

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/CTM1 -

• Message number: 305

• Message text: No suitable source of supply was found due to the lot size

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/CTM1305 - No suitable source of supply was found due to the lot size ?

  The SAP error message /SAPAPO/CTM1305 indicates that the system could not find a suitable source of supply for a particular demand due to constraints related to lot sizes. This error typically occurs in the context of Advanced Planning and Optimization (APO) when using the Capable-to-Match (CTM) functionality.
  Cause:
  
  
  Lot Size Constraints: The source of supply (e.g., production orders, purchase orders) may have lot size constraints that do not match the requirements of the demand. For example, if the demand quantity is less than the minimum lot size or not a multiple of the lot size, the system will not consider that source of supply.
  
  
  Source of Supply Availability: There may be no available sources of supply that meet the lot size requirements for the specific demand.
  
  
  Planning Parameters: The planning parameters set for the product or location may restrict the selection of sources based on lot size.
  
  
  Product Configuration: The product may have specific configuration settings that enforce lot size rules, which can lead to this error if the demand does not align.
  
  
  Solution:
  
  
  Review Lot Size Settings: Check the lot size settings for the relevant materials in the material master. Ensure that the lot size settings (minimum lot size, maximum lot size, and lot size increment) are appropriate for the demand.
  
  
  Adjust Demand Quantity: If possible, adjust the demand quantity to align with the lot size constraints. This may involve changing the order quantity or consolidating orders.
  
  
  Modify Source of Supply: If there are alternative sources of supply available, consider modifying the source of supply to one that can fulfill the demand based on the lot size requirements.
  
  
  Check Planning Parameters: Review the planning parameters in the APO system for the product and location. Ensure that they are set correctly to allow for the selection of sources that can meet the demand.
  
  
  Use Alternative Sourcing: If applicable, consider using alternative sourcing strategies or methods that may allow for smaller quantities or different lot sizes.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for more detailed information on lot size settings and CTM configuration.
  
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like /SAPAPO/CTM to analyze the CTM run and see the details of the planning run that led to the error.
  Material Master: Check the material master data (transaction code MM03) for the relevant material to review the lot size settings.
  APO Configuration: Review the configuration settings in the APO system related to sourcing and lot sizes.
  SAP Notes: Search for relevant SAP Notes that may address specific issues or provide updates related to this error message.
  
  By following these steps, you should be able to identify the root cause of the error and implement a suitable solution.