Message type: E = Error
Message class:  VHUMI - Messages for material identification 
Message number: 028
Message text: Posting date is in the past
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 VHUMI028, which states "Posting date is in the past," typically occurs when you attempt to post a document (such as a goods movement or inventory transaction) with a posting date that is earlier than the current date. This is a common restriction in many SAP systems to ensure data integrity and compliance with accounting principles.
Cause: Posting Date: The posting date you are trying to use is set to a date that is earlier than the current system date. System Settings: The system may have settings that restrict posting to past dates to prevent errors in financial reporting and inventory management. Document Type Restrictions: Certain document types may have specific rules regarding posting dates.
Solution: Change Posting Date: Adjust the posting date to the current date or a future date, depending on your business requirements. Check System Date: Ensure that the system date is correct. If the system date is incorrect, it may
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
VHUMI027 Document date is in the past
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
VHUMI026 Identification has been carried out
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
VHUMI029 Identification is incomplete
What causes this issue?  All of the required materials or containers were not identified.System Response  The system issues an error message and will ...
VHUMI030 Function is only possible in the change mode
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.