How To Fix /SAPAPO/CTM1718 - Internal error occurred while calculating periods

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/CTM1 -

• Message number: 718

• Message text: Internal error occurred while calculating periods

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 /SAPAPO/CTM1718 - Internal error occurred while calculating periods ?

  The SAP error message /SAPAPO/CTM1718 indicates that an internal error occurred during the calculation of periods in the SAP Advanced Planning and Optimization (APO) system, specifically within the Capable-to-Match (CTM) functionality. This error can arise due to various reasons, including data inconsistencies, configuration issues, or problems with the planning run itself.
  Possible Causes:
  
  Data Inconsistencies: There may be issues with master data, such as incorrect or missing data in the product master, location master, or other relevant master data.
  Configuration Issues: Incorrect settings in the CTM configuration or planning parameters can lead to errors during the planning run.
  Resource Constraints: If there are constraints on resources that are not properly defined, it can lead to calculation errors.
  Version Issues: Sometimes, bugs in specific versions of SAP APO can cause internal errors. Ensure that you are on a supported and stable version.
  Memory Issues: Insufficient memory allocation for the planning run can also lead to internal errors.
  
  Solutions:
  
  Check Master Data: Review the relevant master data for completeness and correctness. Ensure that all necessary data is available and correctly configured.
  Review CTM Configuration: Go through the CTM configuration settings to ensure they are set up correctly. Pay attention to planning parameters and resource definitions.
  Analyze Logs: Check the application logs (transaction SLG1) for more detailed error messages that can provide insights into what went wrong during the planning run.
  Run in Debug Mode: If you have access to development resources, consider running the planning run in debug mode to identify the exact point of failure.
  Check for Notes and Patches: Look for SAP Notes related to this error message. SAP frequently releases patches and notes that address known issues.
  Increase Memory Allocation: If memory issues are suspected, consider increasing the memory allocation for the planning run.
  Contact SAP Support: If the issue persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like /SAPAPO/CTM for CTM planning runs and SLG1 for application logs.
  SAP Notes: Search the SAP Support Portal for relevant notes that may address this specific error.
  Documentation: Review the SAP APO documentation for best practices in configuring and running CTM.
  
  By following these steps, you should be able to identify and resolve the underlying cause of the /SAPAPO/CTM1718 error.