How To Fix /BDL/D-311 - RFC block size outside valid boundaries [2kB - 4MB]

SAP Error Message - Details

• Message type: E = Error

• Message class: /BDL/D- -

• Message number: 311

• Message text: RFC block size outside valid boundaries [2kB - 4MB]

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /BDL/D-311 - RFC block size outside valid boundaries [2kB - 4MB] ?

  The SAP error message /BDL/D-311 RFC block size outside valid boundaries [2kB - 4MB] typically indicates that there is an issue with the size of the data being sent or received via Remote Function Call (RFC) in SAP. This error occurs when the block size of the data exceeds the valid limits set by the SAP system, which are between 2 kilobytes (kB) and 4 megabytes (MB).
  Cause:
  
  Data Size Exceeds Limits: The most common cause of this error is that the data being processed in the RFC call is either too small (less than 2kB) or too large (greater than 4MB).
  Configuration Issues: There may be configuration settings in the SAP system that are not aligned with the expected data sizes.
  Network Issues: Sometimes, network configurations or limitations can affect the size of the data packets being transmitted.
  Programmatic Errors: If there is a custom program or function module involved, it may be incorrectly handling data sizes.
  
  Solution:
  
  Check Data Size: Review the data being sent in the RFC call. Ensure that it falls within the acceptable range of 2kB to 4MB. If the data is too large, consider breaking it into smaller chunks.
  Adjust Configuration: If applicable, check the configuration settings related to RFC in the SAP system. Ensure that they are set correctly to handle the expected data sizes.
  Review Custom Code: If you are using custom ABAP code, review it to ensure that it is correctly managing data sizes and not inadvertently creating oversized data blocks.
  Use Compression: If the data is large but can be compressed, consider using compression techniques to reduce the size before sending it over RFC.
  Monitor Network Settings: Check network settings and configurations to ensure that they are not limiting the size of the data packets being transmitted.
  
  Related Information:
  
  RFC Protocol: RFC is a protocol used in SAP for communication between different SAP systems or between SAP and non-SAP systems. Understanding how RFC works can help in troubleshooting related issues.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error. SAP frequently updates its knowledge base with solutions for common problems.
  Transaction Codes: Use transaction codes like SM58 (for monitoring asynchronous RFC calls) or SM21 (for system logs) to gather more information about the error context.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the error and implement a suitable solution.