Message type: E = Error
Message class:  /SEHS/DG_DG -  
Message number: 409
Message text: No function module has been assigned to the DG check method
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 /SEHS/DG_DG409 No function module has been assigned to the DG check method typically occurs in the context of Dangerous Goods (DG) management within SAP. This error indicates that the system is unable to find a function module that is supposed to be linked to a specific Dangerous Goods check method. Here’s a breakdown of the cause, potential solutions, and related information:
Cause: Missing Function Module Assignment: The error arises when a Dangerous Goods check method is defined in the system, but there is no corresponding function module assigned to it. This can happen if the configuration is incomplete or if the function module was deleted or not created.
Configuration Issues: The configuration settings for Dangerous Goods management may not be properly set up, leading to missing links between check methods and their respective function modules. Custom Development: If there are custom checks implemented, the function module may not have been
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
/SEHS/DG_DG408 No indicator profile maintained for dangerous goods checks
What causes this issue?  No dangerous goods indicator profile is entered in Customizing for <LS>Dangerous Goods Management</> for the prod...
/SEHS/DG_DG407 Document does not contain products that need checking
What causes this issue?  None of the products in the document contains a dangerous goods indicator profile that identifies the product as relevant for...
/SEHS/DG_DG410 Check schema________: &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SEHS/DG_DG411 Sequence: &1  Routine: &2  &3
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.