How To Fix M3754 - The type of block must be the same for all buffered records

SAP Error Message - Details

• Message type: E = Error

• Message class: M3 - Material Master

• Message number: 754

• Message text: The type of block must be the same for all buffered records

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message M3754 - The type of block must be the same for all buffered records ?

  The SAP error message M3754, "The type of block must be the same for all buffered records," typically occurs in the context of Material Management (MM) or Inventory Management (IM) when there is an inconsistency in the data being processed, particularly with buffered records in the database.
  Cause:
  This error usually arises due to one of the following reasons:
  
  
  Inconsistent Data Types: The records being processed have different data types or structures, which is not allowed when dealing with buffered records. For example, if you are trying to process records that are expected to be of a certain type (e.g., material master records) but some records are of a different type, this error will occur.
  
  
  Buffering Issues: If there are issues with the buffering mechanism in SAP, such as corrupted buffers or inconsistencies in the data stored in the buffer, this error can be triggered.
  
  
  Custom Development: If there are custom programs or enhancements that manipulate buffered records, they may inadvertently introduce inconsistencies in the data types.
  
  
  Solution:
  To resolve the M3754 error, you can take the following steps:
  
  
  Check Data Consistency: Review the records being processed to ensure they are of the same type. You can do this by checking the relevant tables in the database (e.g., MARA for material master data) to ensure that all records conform to the expected structure.
  
  
  Clear Buffers: If you suspect that the issue is related to buffering, you can try to clear the buffers. This can be done using transaction codes like SM12 (to delete lock entries) and SM21 (to check system logs for errors).
  
  
  Review Custom Code: If there are any custom programs or enhancements that interact with the buffered records, review the code to ensure that it is correctly handling the data types and structures.
  
  
  Check SAP Notes: Look for any relevant SAP Notes that may address this specific error. SAP frequently releases notes that provide fixes or workarounds for known issues.
  
  
  Consult SAP Support: If the issue persists after trying the above steps, consider reaching out to SAP Support for further assistance. They can provide more specific guidance based on your system configuration and the context of the error.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SE11 (Data Dictionary), SE80 (Object Navigator), and SE37 (Function Module) to analyze the data structures and custom code.
  SAP Documentation: Review SAP documentation related to Material Management and Inventory Management for more context on how buffered records are handled.
  System Logs: Check system logs for any additional error messages or warnings that may provide more insight into the issue.
  
  By following these steps, you should be able to identify the cause of the M3754 error and implement a solution to resolve it.