Message type: E = Error
Message class:  /SAPAPO/LOM -  
Message number: 004
Message text: Business system group is initial
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 /SAPAPO/LOM004 Business system group is initial typically occurs in the context of SAP Advanced Planning and Optimization (APO) when there is an issue with the configuration of business system groups. This error indicates that the system is trying to access or utilize a business system group that has not been properly defined or initialized.
Cause: Missing Configuration: The business system group has not been defined in the system. Incorrect Settings: The settings for the business system group may be incomplete or incorrect. Transport Issues: If the configuration was transported from another system, it may not have been transported correctly. Authorization Issues: The user may not have the necessary authorizations to access the business system group.
Solution: Check Configuration: Go to the transaction code /SAPAPO/LOC3 (or the relevant transaction for your version) to check the configuration of business system groups. Ensure that the business system group is defined and that all necessary parameters are set. Define Business
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
/SAPAPO/LOM003 Mapping table passed on is initial
What causes this issue?  The mapping table passed on is initial although the optional parameter <LS>IV_MAP_USE</> has been set.System Resp...
/SAPAPO/LOM002 Location type is initial
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SAPAPO/LOM005 Logical system is initial
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SAPAPO/LOM006 Location table transferred is initial
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.