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.

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 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