Message type: E = Error
Message class:  IH - structuring 
Message number: 040
Message text: No assembly was entered in notification &
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.
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The SAP error message IH040 ("No assembly was entered in notification &") typically occurs in the context of maintenance notifications or work orders when the system expects an assembly (or equipment) to be specified, but none has been provided. This can happen in various scenarios, such as when creating or processing notifications related to maintenance activities.
Cause:
Missing Assembly Information: The notification or work order does not have an assembly or equipment number specified.
Incorrect Configuration: The system configuration may not be set up to allow for the entry of assemblies in certain types of notifications.
User Input Error: The user may have overlooked entering the required assembly information when creating the notification.
Solution:
Enter Assembly Information: 
Go to the notification or work order in question and ensure that the assembly or equipment number is entered in the appropriate field.
If you are creating a new notification, make sure to fill in all mandatory fields, including the Get instant SAP help. Sign up for our Free Essentials Plan.
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