How To Fix CM304 - You have reached the first operation selected.

SAP Error Message - Details

• Message type: E = Error

• Message class: CM - Task list messages: Material component allocations

• Message number: 304

• Message text: You have reached the first operation selected.

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 CM304 - You have reached the first operation selected. ?

  The SAP error message CM304 ("You have reached the first operation selected.") typically occurs in the context of production orders or routing operations. This message indicates that the user is trying to navigate to an operation that is not available because they are already at the first operation in the sequence.
  Cause:
  
  Navigation Attempt: The user is attempting to navigate backward in the operation sequence when they are already at the first operation.
  Routing Configuration: The routing for the production order may not be set up correctly, or the operations may not be sequenced properly.
  User Action: The user may have inadvertently clicked on a button or link that attempts to move to a previous operation.
  
  Solution:
  
  Check Current Operation: Verify that you are indeed at the first operation. If you are, you cannot navigate backward.
  Use Forward Navigation: If you need to move to the next operation, use the appropriate navigation button or command to proceed forward.
  Review Routing: If you believe there is an issue with the routing, check the routing configuration in the system to ensure that all operations are correctly defined and sequenced.
  Consult Documentation: Refer to SAP documentation or help resources for guidance on navigating operations within production orders or routings.
  User Training: If this is a recurring issue, consider providing additional training for users on how to navigate within the production order or routing screens.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CO01 (Create Production Order), CO02 (Change Production Order), and CA03 (Display Routing) to manage production orders and routings effectively.
  SAP Notes: Check SAP Notes for any known issues or updates related to this error message.
  User Roles: Ensure that users have the appropriate roles and permissions to navigate and manage production orders and routings.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a technical consultant for further assistance.