How To Fix CY801 - You should look in the scheduling log and the planning log

SAP Error Message - Details

• Message type: E = Error

• Message class: CY - Capacity Requirements Planning

• Message number: 801

• Message text: You should look in the scheduling log and the planning log

What causes this issue?

Errors or warnings occurred during the last planning step carried out
both during planning and during scheduling. Therefore you should look
at both logs.

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 CY801 - You should look in the scheduling log and the planning log ?

  The SAP error message CY801 typically indicates that there is an issue with the scheduling or planning process in the SAP system, particularly in the context of production planning and control (PP) or capacity planning. This message suggests that you should check the scheduling log and the planning log for more detailed information about the error.
  Cause:
  
  Data Issues: There may be missing or incorrect data in the master data (e.g., material master, routing, work center) that is affecting the scheduling or planning process.
  Capacity Constraints: The system may be unable to schedule operations due to capacity constraints or conflicts in the work center.
  Planning Parameters: Incorrect planning parameters or settings in the configuration may lead to scheduling issues.
  Dependencies: There may be dependencies or constraints that are not being met, such as material availability or lead times.
  Errors in the Planning Run: The planning run may have encountered errors that prevented it from completing successfully.
  
  Solution:
  
  Check the Logs: As suggested by the error message, start by reviewing the scheduling log and planning log. These logs will provide specific details about what went wrong during the scheduling or planning process.
  Review Master Data: Ensure that all relevant master data (material master, routing, work center) is complete and accurate. Look for any missing or incorrect entries.
  Analyze Capacity: Check the capacity of the work centers involved in the planning process. Ensure that there are no over-allocations or conflicts.
  Adjust Planning Parameters: Review and adjust the planning parameters in the configuration settings if necessary. This may include lead times, lot sizes, and other relevant settings.
  Run Planning Again: After addressing any identified issues, re-run the planning process to see if the error persists.
  Consult Documentation: Refer to SAP documentation or help resources for additional guidance on the specific error and its resolution.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like MD04 (Stock/Requirements List) or MD02 (MRP Run) to analyze the situation further.
  SAP Notes: Check for any relevant SAP Notes that may address known issues related to this error message.
  User Forums: Consider visiting SAP community forums or user groups for insights from other users who may have encountered similar issues.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP support team or a technical consultant who can provide more in-depth analysis and assistance.