How To Fix CRM_MKTLIST_MAP055 - Mapping format &1 is in a reserved namespace; rename the mapping format

SAP Error Message - Details

• Message type: E = Error

• Message class: CRM_MKTLIST_MAP - CRM Marketing:External List management mapping Messages

• Message number: 055

• Message text: Mapping format &1 is in a reserved namespace; rename the mapping format

What causes this issue?

You attempted to create a mapping format beginning with 1. This name
range is reserved for variants maintained in transaction CRMD_MKT_EXP to
export fields of a target group to a file.

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?

Rename the mapping format.

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 CRM_MKTLIST_MAP055 - Mapping format &1 is in a reserved namespace; rename the mapping format ?

  The SAP error message CRM_MKTLIST_MAP055 indicates that the mapping format you are trying to use is in a reserved namespace. This typically occurs when you attempt to create or use a mapping format that is not allowed because it conflicts with SAP's reserved naming conventions.
  Cause:
  
  Reserved Namespace: SAP has certain namespaces that are reserved for its own use. If you try to create a mapping format using a name that falls within this reserved namespace, you will encounter this error.
  Naming Convention Violation: The mapping format name may not comply with the naming conventions set by SAP, which can include restrictions on certain prefixes or patterns.
  
  Solution:
  
  Rename the Mapping Format: The most straightforward solution is to rename the mapping format to something that does not fall within the reserved namespace. Choose a name that adheres to SAP's naming conventions and does not conflict with existing reserved names.
  Check Documentation: Refer to SAP documentation or guidelines regarding naming conventions for mapping formats to ensure compliance.
  Use Custom Namespace: If you are developing custom solutions, consider using a custom namespace (e.g., Z or Y) for your objects to avoid conflicts with SAP's reserved namespaces.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific guidance or updates related to this error message. SAP Notes often provide insights into known issues and their resolutions.
  Transaction Codes: You may need to use transaction codes like CRMD_ORDER or CRMD_ORDERADM_H to manage your mapping formats and check for existing formats that may be causing conflicts.
  Development Guidelines: Familiarize yourself with SAP's development guidelines, especially if you are working in an ABAP environment, to avoid similar issues in the future.
  
  By following these steps, you should be able to resolve the error and successfully create or use the desired mapping format.