Message type: E = Error
Message class:  FRMLDLG - RMS-FRM: Dialog Messages for Formula 
Message number: 154
Message text: Change number &1 was not found
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.
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.
The SAP error message FRMLDLG154, which states "Change number &1 was not found," typically occurs in the context of change management within SAP, particularly when dealing with change numbers in the context of engineering change management (ECM) or similar processes.
Cause: Non-Existent Change Number: The change number you are trying to reference does not exist in the system. This could be due to a typo or because the change number has not been created yet. Authorization Issues: The user may not have the necessary authorizations to view or access the change number. Data Deletion: The change number may have been deleted or archived, making it unavailable for the current operation. Incorrect Context: The change number may not be applicable in the context you are trying to use it (e.g., trying to use a change number in a different module or process).
Solution: Verify Change Number: Double-check the change number you are entering for any typographical errors. Ensure
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
FRMLDLG153 Error occurred while creating the formula; see application log
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FRMLDLG152 Cannot be created; inheritance template &1 was not found in group &2
What causes this issue?  You want to create a formula by copying a template. In order to be able to copy identifiers and value assignments, the system...
FRMLDLG155 You do not have authorization for &1 &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FRMLDLG156 System cannot copy; source formula must be different from target formula
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.