Message type: E = Error
Message class:  SD_FREE_GOODS_MSG - Message class for Free Goods maintenance 
Message number: 023
Message text: Minimum quantity is required.
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 SD_FREE_GOODS_MSG023 with the description "Minimum quantity is required" typically occurs in the context of free goods processing in the Sales and Distribution (SD) module. This error indicates that the minimum quantity required for a free goods promotion has not been met in the sales order.
Cause: Minimum Quantity Not Met: The sales order does not meet the minimum quantity requirement set for the free goods promotion. Promotion Configuration: The free goods promotion may be configured incorrectly, or the conditions for the promotion may not be aligned with the order being processed. Item Category: The item category used in the sales order may not be set up to allow free goods processing. Pricing Procedure: The pricing procedure may not be correctly configured to handle free goods.
Solution: Check Minimum Quantity: Review the free goods promotion conditions to ensure that the minimum quantity required is met in the sales order. Adjust the order quantity if
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
SD_FREE_GOODS_MSG022 Customer number is required.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SD_FREE_GOODS_MSG021 Distribution channel is required.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SD_FREE_GOODS_MSG024 Free goods quantity is required.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SD_FREE_GOODS_MSG025 Unit for minimum quantity and free goods quantity is required.
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.