How To Fix CM300 - Select operation first

CM300 - Overview

• Message type: E = Error

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

• Message number: 300

• Message text: Select operation first

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 CM300 - Select operation first ?

  The SAP error message CM300 "Select operation first" typically occurs in the context of production planning or order management within the SAP system. This error indicates that the user is trying to perform an action that requires a specific operation to be selected first, but no operation has been selected.
  
  Cause:
  
  No Operation Selected: The most common cause of this error is that the user has not selected any operation in the routing or production order before attempting to execute an action (like confirming, changing, or displaying details).
  Incorrect Navigation: The user may have navigated to a screen or function that requires an operation to be selected but did not do so.
  User Interface Issues: Sometimes, the user interface may not clearly indicate that an operation needs to be selected, leading to confusion.
  
  
  Solution:
  
  Select an Operation: Before performing the action that triggered the error, ensure that you have selected the appropriate operation from the list.