How To Fix /BOBF/COM_GEN_MODEL303 - External Modifier &1: METADATA_TYPE argument &2 is unknown

SAP Error Message - Details

• Message type: E = Error

• Message class: /BOBF/COM_GEN_MODEL -

• Message number: 303

• Message text: External Modifier &1: METADATA_TYPE argument &2 is unknown

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /BOBF/COM_GEN_MODEL303 - External Modifier &1: METADATA_TYPE argument &2 is unknown ?

  The SAP error message /BOBF/COM_GEN_MODEL303 indicates that there is an issue with the external modifier in the Business Object Framework (BOF) in SAP. Specifically, the error message states that the METADATA_TYPE argument provided is unknown. This typically occurs when the system encounters an unexpected or unrecognized value for the METADATA_TYPE parameter in the context of a business object operation.
  Cause:
  
  Incorrect Metadata Type: The most common cause of this error is that the METADATA_TYPE argument being passed to the external modifier is not defined or recognized in the system. This could be due to a typo, an outdated reference, or a missing configuration.
  Custom Development Issues: If there are custom developments or modifications in the business object framework, they may not be correctly implemented, leading to this error.
  Version Mismatch: If there are inconsistencies between the versions of the business object or the associated components, it may lead to this error.
  Transport Issues: If the business object or its metadata was transported from one system to another, and the transport did not include all necessary components, it could lead to this error.
  
  Solution:
  
  Check the METADATA_TYPE Argument: Verify the value being passed for the METADATA_TYPE argument. Ensure that it matches one of the expected values defined in the system.
  Review Custom Code: If there are custom implementations, review the code to ensure that the METADATA_TYPE is being set correctly and that it corresponds to a valid type.
  Update or Correct Metadata: If the metadata type is indeed missing or incorrect, you may need to update the metadata definitions in the system to include the correct type.
  Check for Transport Issues: If the issue arose after a transport, ensure that all necessary components were included in the transport request. You may need to re-transport the missing components.
  Consult Documentation: Refer to the SAP documentation for the specific business object you are working with to ensure that you are using the correct parameters and values.
  Debugging: If you have access to the development environment, consider debugging the code to trace where the error is being triggered and what values are being passed.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates their knowledge base with solutions for common problems.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  SAP Help Portal: Utilize the SAP Help Portal for detailed documentation on the Business Object Framework and its components.
  
  If the issue persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.