Message type: E = Error
Message class:  APPL_MM_PUR_PO - Message Class for Purchase Order 
Message number: 006
Message text: Material &1 does not exist in plant &2
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 APPL_MM_PUR_PO006 indicates that a specific material (denoted as &1) does not exist in the specified plant (denoted as &2). This error typically occurs during the creation or processing of purchase orders, and it can be caused by several factors. Here’s a breakdown of the cause, potential solutions, and related information:
Cause: Material Not Created: The material has not been created in the specified plant. This can happen if the material master data has not been extended to the plant in question. Incorrect Plant: The plant specified in the transaction may be incorrect or may not be the intended plant for the material. Material Deactivation: The material may have been deactivated or marked for deletion in the specified plant. Data Synchronization Issues: There may be issues with data synchronization if the system is integrated with other systems or if there are recent changes that have not been updated properly.
Solution: Check Material Existence: Use transaction
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
APPL_MM_PUR_PO005 Plant &1 does not exist
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
APPL_MM_PUR_PO004 Purchasing group &1 does not exist
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
APPL_MM_PUR_PO007 Purchasing organization &1 is not responsible for plant &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
APPL_MM_PUR_PO008 Storage location &1 does not exist in plant &2
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.