How To Fix MW851 - Parts of & index blocked. Not all items can be processed

SAP Error Message - Details

• Message type: E = Error

• Message class: MW - Messages IS-R / Allocation Tables

• Message number: 851

• Message text: Parts of & index blocked. Not all items can be processed

What causes this issue?

The work list contains entries that are blocked because they have
already been processed.

System Response

The blocked entries are not displayed in the overview.

How to fix this error?

Only process the entries that are not blocked or select the same
work list again later on.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MW851 - Parts of & index blocked. Not all items can be processed ?

  The SAP error message MW851 ("Parts of & index blocked. Not all items can be processed") typically occurs in the context of inventory management or material management when there are issues with the material master data or the stock levels in the system. This error indicates that certain parts of the index are blocked, preventing the system from processing all items as expected.
  Causes:
  
  Blocked Stock: The material may have blocked stock, which means that it cannot be used for certain transactions until it is unblocked.
  Index Issues: The index for the material may be corrupted or not updated, leading to inconsistencies in the data.
  Authorization Issues: The user may not have the necessary authorizations to access or modify certain materials or stock types.
  Data Inconsistencies: There may be inconsistencies in the material master data or stock levels that need to be resolved.
  Batch Management: If batch management is enabled, there may be issues with specific batches that are causing the blockage.
  
  Solutions:
  
  Check Blocked Stock: Review the stock status of the materials involved. You can use transaction codes like MB52 or MB5B to check stock levels and identify any blocked stock.
  Unblock Stock: If there is blocked stock, you may need to unblock it using transaction MB1A or MB1B depending on the situation.
  Rebuild Index: If the index is corrupted, you may need to rebuild it. This can often be done using transaction MM42 or by running a program to regenerate the index.
  Check Authorizations: Ensure that the user has the necessary authorizations to perform the required actions on the materials.
  Data Consistency Check: Use transaction MM03 to check the material master data for inconsistencies. You may also want to run consistency checks or reports to identify any issues.
  Batch Management Review: If batch management is in use, check the status of the batches associated with the materials to ensure they are not causing the blockage.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MB52, MB1A, MB1B, MM03, and MM42.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search the SAP Support Portal for specific notes that may address your situation.
  Documentation: Review SAP documentation related to inventory management and material master data for best practices and troubleshooting steps.
  
  If the issue persists after trying the above solutions, it may be necessary to consult with your SAP support team or a technical consultant for further assistance.