Message type: E = Error
Message class:  /SAPAPO/PDEM -  
Message number: 291
Message text: Error Calculating Location (Order &1, Item &2, BSG &3, Plant &4)
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/PDEM291 indicates an issue with calculating the location for a specific order and item in the Advanced Planning and Optimization (APO) module. This error typically arises in the context of demand planning or supply network planning when the system is unable to determine a valid location for the specified order and item combination. Causes: Missing Master Data: The error may occur if there is missing or incomplete master data for the location, product, or order. This includes missing location data in the master data tables. Invalid Configuration: The configuration settings for the planning area or the location may not be set up correctly, leading to issues in location determination. Inconsistent Data: There may be inconsistencies in the data related to the order, item, or plant, such as incorrect or missing entries in the relevant tables. Planning Area Issues: The planning area may not be properly defined or may not include the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
/SAPAPO/PDEM290 Error Calculating BSV (Order &1, Item &2, Logical System &3)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SAPAPO/PDEM289 Error Calculating Prod. GUID (Order &1, Item &2, Prod. Number &3)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SAPAPO/PDEM292 Error Calculating Replenishment Ind. (Ord. &1, Item &2, Prod. &3 Loc. &4)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SAPAPO/PDEM293 Error Calculating BOD (Order &1, Item &2, Prod. Number &3, Loc. No. &4)
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.