How To Fix MW551 - Invalid value for request flag. Valid: empty, 1, 2

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 551

• Message text: Invalid value for request flag. Valid: empty, 1, 2

What causes this issue?

You entered a value that is not allowed for interface parameter
REQUESTFLAG.

System Response

The system cannot select any allocation tables.

How to fix this error?

Make a new selection and leave the interface parameter REQUESTFLAG
empty or set one of the following values:

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

1: Selects allocation tables for which requested quantities have still
to be entered by the date specified.
2:Selects allocation tables for which requested quantities have still
to be entered or can still be changed by the date specified.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MW551 - Invalid value for request flag. Valid: empty, 1, 2 ?

  The SAP error message MW551, which states "Invalid value for request flag. Valid: empty, 1, 2," typically occurs in the context of inventory management or material movements. This error indicates that an invalid value has been provided for a request flag in a transaction or function that expects specific values.
  Cause:
  The error is usually caused by one of the following reasons:
  
  
  Incorrect Input: The user has entered an invalid value for the request flag field. The valid values are:
  
  Empty (no value)
  1 (indicating a specific request type)
  2 (indicating another specific request type)
  
  
  
  Configuration Issues: There may be a configuration issue in the system that is causing the request flag to be set incorrectly.
  
  
  Custom Code: If there are custom developments or enhancements in the system, they may be passing an invalid value to the request flag.
  
  
  Solution:
  To resolve the MW551 error, you can take the following steps:
  
  
  Check Input Values: Review the input values being provided in the transaction. Ensure that the request flag is either left empty or set to 1 or 2 as required by the specific transaction.
  
  
  Review Configuration: If you have access to the configuration settings, check the relevant settings for the transaction or process you are working with. Ensure that the request flag is configured correctly.
  
  
  Debugging: If you suspect that custom code is involved, you may need to debug the program or transaction to identify where the invalid value is being set. Look for any user exits, BAdIs, or enhancements that might be affecting the request flag.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for the specific transaction you are using to understand the expected values for the request flag.
  
  
  Contact Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting with SAP support for further assistance.
  
  
  Related Information:
  
  Transaction Codes: The error may occur in various transaction codes related to inventory management, such as MIGO (Goods Movement), MB1A (Goods Withdrawal), or others.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  User Forums: SAP Community and other user forums can be helpful for finding similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify and resolve the MW551 error in your SAP system.