How To Fix OM904 - Please enter blank or X

SAP Error Message - Details

• Message type: E = Error

• Message class: OM - Customizing Materialwirtschaft

• Message number: 904

• Message text: Please enter blank or X

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message OM904 - Please enter blank or X ?

  The SAP error message OM904 ("Please enter blank or X") typically occurs in the context of configuration settings related to the Material Management (MM) module, particularly when dealing with the configuration of the material types or other related settings.
  Cause:
  The error message OM904 usually indicates that a required field is not filled out correctly. Specifically, it suggests that the system expects either a blank value or an 'X' (which often signifies a specific option or setting) in a certain field. This can happen in various scenarios, such as:
  
  Incorrect Configuration: When configuring material types, the system may require a specific setting to be either blank or marked with an 'X'.
  Data Entry Error: Users may inadvertently enter an invalid value in a field that only accepts blank or 'X'.
  Missing Default Settings: If default settings for a particular configuration are not set, the system may throw this error.
  
  Solution:
  To resolve the OM904 error, you can follow these steps:
  
  
  Check Configuration Settings:
  
  Navigate to the relevant configuration area in SAP (e.g., SPRO) where the error is occurring.
  Review the settings for the material type or the specific configuration that is causing the error.
  Ensure that the field in question is either left blank or filled with 'X' as required.
  
  
  
  Data Entry Review:
  
  If the error occurs during data entry, double-check the values being entered in the relevant fields.
  Make sure that you are not entering any invalid characters or values.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help files related to the specific configuration you are working on. This can provide insights into what values are acceptable.
  
  
  
  Testing:
  
  After making changes, test the configuration or data entry again to see if the error persists.
  
  
  
  Seek Help from SAP Support:
  
  If you are unable to resolve the issue, consider reaching out to SAP support or consulting with a colleague who has experience with the specific configuration.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes that may be involved in the configuration process, such as MM01 (Create Material), MM02 (Change Material), or SPRO (SAP Project Reference Object).
  SAP Notes: Check for any SAP Notes related to the error message OM904, as they may provide additional context or solutions.
  User 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 cause of the OM904 error and implement the necessary changes to resolve it.