Message type: E = Error
Message class:  /SAPAPO/PDEM -  
Message number: 893
Message text: Base Unit of Measure entered in line &1 is not correct
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/PDEM893 indicates that the Base Unit of Measure (BOM) entered for a specific line item is not correct. This error typically occurs in the context of Advanced Planning and Optimization (APO) when dealing with product master data or during planning activities.
Cause: Incorrect Base Unit of Measure: The base unit of measure defined for the product in the system does not match the expected unit of measure for the operation being performed.
Configuration Issues: There may be configuration issues in the APO system or in the integration with the ERP system. Data Inconsistencies: There could be inconsistencies in the master data, such as the product master or the material master, where the base unit of measure is not properly defined or is missing. Unit of Measure Conversion: If there are conversion factors defined between different units of measure, they may not be set up correctly.
Solution: Check Product Master Data: Go to the product
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
/SAPAPO/PDEM892 No BOD Found for Product &1 and Location &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SAPAPO/PDEM891 NOOEMLOC for line &1 is not entered in the Excel file
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SAPAPO/PDEM894 &1 entries have been saved successfully in SD Demand table
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SAPAPO/PDEM895 Block &1 has no records to delete from Future BOD Demand History table
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.