How To Fix B1731 - Setting the block size of message type & has failed

SAP Error Message - Details

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 731

• Message text: Setting the block size of message type & has failed

Self-Explanatory Message

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.

What else can you do?

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message B1731 - Setting the block size of message type & has failed ?

  The SAP error message B1731, which states "Setting the block size of message type & has failed," typically occurs in the context of SAP's IDoc (Intermediate Document) processing. This error indicates that there was an issue when trying to set the block size for a specific message type during the IDoc processing.
  Causes:
  
  Configuration Issues: The message type may not be properly configured in the system, leading to issues when trying to set the block size.
  Data Issues: The data being processed may not conform to the expected structure or may contain invalid entries.
  System Limitations: There may be limitations in the system regarding the maximum block size that can be set for the message type.
  Transport Issues: If the message type was recently transported from another system, there may be inconsistencies or missing configurations.
  
  Solutions:
  
  
  Check Configuration: 
  
  Verify the configuration of the message type in transaction WE81 (Message Types) and WE82 (Basic Types). Ensure that the message type is correctly defined and that all necessary settings are in place.
  
  
  
  Review IDoc Settings:
  
  Check the IDoc settings in transaction WE20 (Partner Profiles) to ensure that the partner profile is correctly configured for the message type in question.
  
  
  
  Validate Data:
  
  Ensure that the data being sent in the IDoc is valid and conforms to the expected structure. You can use transaction WE19 to test and simulate IDoc processing.
  
  
  
  Check System Logs:
  
  Review the system logs (transaction SLG1) for any additional error messages or warnings that may provide more context about the failure.
  
  
  
  Adjust Block Size:
  
  If applicable, consider adjusting the block size settings in the relevant configuration areas. This may involve changing parameters in the IDoc processing settings.
  
  
  
  Consult SAP Notes:
  
  Search for relevant SAP Notes in the SAP Support Portal that may address this specific error message or provide patches or updates that resolve the issue.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP Support for further assistance.
  
  
  
  Related Information:
  
  IDoc Processing: Understanding how IDocs work in SAP can help in troubleshooting issues related to message types and block sizes.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as WE02 (Display IDoc), WE05 (IDoc List), and WE19 (Test Tool for IDocs) for monitoring and testing IDocs.
  Documentation: Review SAP documentation related to IDoc configuration and processing for best practices and guidelines.
  
  By following these steps, you should be able to identify the cause of the B1731 error and implement a solution to resolve it.