How To Fix CY766 - Order & Operation &: Displayed dates of operation cannot be changed

CY766 - Overview

• Message type: E = Error

• Message class: CY - Capacity Requirements Planning

• Message number: 766

• Message text: Order & Operation &: Displayed dates of operation cannot be changed

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 CY766 - Order & Operation &: Displayed dates of operation cannot be changed ?

  The SAP error message CY766 ("Order & Operation &: Displayed dates of operation cannot be changed") typically occurs in the context of production orders or operations within the SAP system, particularly when working with capacity planning or scheduling.
  
  Cause:
  This error message is usually triggered when you attempt to change the dates of an operation in a production order that is not allowed due to the following reasons:
  
  Status of the Order: The production order may be in a status that does not allow changes (e.g., "TECO" - Technically Completed, "CLSD" - Closed).
  Dependencies: There may be dependencies or constraints that prevent the modification of dates, such as linked operations or resource availability.
  Scheduling Parameters: The scheduling parameters set for the operation may restrict changes to the dates.
  Locked by Other Processes: The operation might be locked by another user or process, preventing changes.
  
  
  Solution:
  To resolve the CY766 error, you can take the following steps:
  
  
  Check Order Status: