How To Fix MD_SUBSTN008 - Percentage is not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: MD_SUBSTN - Messages for Master Data Substitution

• Message number: 008

• Message text: Percentage is not allowed

What causes this issue?

Application area does not support percentage. For more information,
refer to Product Assistance for Product Substitution.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MD_SUBSTN008 - Percentage is not allowed ?

  The SAP error message MD_SUBSTN008: Percentage is not allowed typically occurs in the context of Material Requirements Planning (MRP) or when dealing with substitution or alternative materials in SAP. This error indicates that a percentage value has been incorrectly entered in a field where it is not permitted.
  Cause:
  
  Incorrect Input: The most common cause is that a user has entered a percentage value in a field that only accepts whole numbers or specific values. This can happen in various scenarios, such as when defining substitution ratios or alternative materials.
  Configuration Issues: There may be configuration settings in the material master or MRP settings that do not allow for percentage values in certain fields.
  Data Entry Errors: Users may mistakenly enter a percentage sign (%) or a decimal value in a field that does not support it.
  
  Solution:
  
  Check Input Fields: Review the fields where the error is occurring. Ensure that you are entering whole numbers or the correct format as required by the system. Remove any percentage signs or decimal points.
  Review Material Master Data: If the error is related to material substitution, check the material master data for the relevant materials. Ensure that the substitution ratios are entered correctly.
  Consult Documentation: Refer to SAP documentation or help files for the specific transaction or module you are working with to understand the expected input formats.
  Configuration Review: If you have access, review the configuration settings in the SAP system related to MRP or material substitution to ensure they are set up correctly.
  User Training: If this error is common among users, consider providing training or guidelines on how to enter data correctly in the relevant fields.
  
  Related Information:
  
  Transaction Codes: The error may occur in various transactions related to MRP, such as MD01 (MRP Run), MD02 (Single-item, Multi-level Planning), or when maintaining material master data (MM01, MM02).
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context or fixes.
  Support: If the issue persists after checking the above points, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  By following these steps, you should be able to resolve the MD_SUBSTN008 error and ensure that data is entered correctly in the SAP system.