How To Fix MPLAN026 - Field & cannot be filled -> value reset

SAP Error Message - Details

• Message type: E = Error

• Message class: MPLAN - Messages for Maintenance Plan API

• Message number: 026

• Message text: Field & cannot be filled -> value reset

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MPLAN026 - Field & cannot be filled -> value reset ?

  The SAP error message MPLAN026 indicates that a specific field cannot be filled, and as a result, its value is reset. This error typically occurs in the context of Material Planning (MP) or Production Planning (PP) modules when there is an issue with the data being processed.
  Cause:
  The error can be caused by several factors, including:
  
  
  Missing or Incorrect Data: The field in question may require certain data that is either missing or incorrectly formatted. This could be related to master data (like material master, BOM, routing) or planning parameters.
  
  
  Configuration Issues: There may be configuration settings in the system that prevent the field from being filled. This could be due to settings in the planning strategy, MRP type, or other related configurations.
  
  
  Data Inconsistencies: Inconsistencies in the data, such as mismatched units of measure or incompatible settings between different master data records, can lead to this error.
  
  
  User Authorizations: Sometimes, the user may not have the necessary authorizations to fill certain fields, leading to a reset of the value.
  
  
  Solution:
  To resolve the MPLAN026 error, you can take the following steps:
  
  
  Check the Field Requirements: Identify which field is causing the issue and check the requirements for that field. Ensure that all necessary data is correctly entered.
  
  
  Review Master Data: Verify the relevant master data (material master, BOM, routing) for completeness and correctness. Ensure that all required fields are filled and that there are no inconsistencies.
  
  
  Configuration Review: Check the configuration settings related to the planning process. Ensure that the settings for MRP types, planning strategies, and other relevant parameters are correctly set up.
  
  
  Authorization Check: Ensure that the user has the necessary authorizations to fill the field. If not, work with your SAP security team to obtain the required access.
  
  
  Debugging: If the issue persists, consider using the SAP debugging tools to trace the program execution and identify where the error is occurring.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to the specific error message for additional insights and potential fixes.
  
  
  SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance, providing them with the error message details and any relevant context.
  
  
  Related Information:
  
  Transaction Codes: You may want to check transactions like MD01 (MRP Run), MD02 (Single-item, Multi-level Planning), or MD04 (Stock/Requirements List) to see if the error occurs during these processes.
  SAP Notes: Search for SAP Notes related to MPLAN026 for any known issues or patches that may address the problem.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to identify the root cause of the MPLAN026 error and implement a suitable solution.