How To Fix SWDP_WB_TOOL251 - Attribute &1: Mapping type &2 is not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: SWDP_WB_TOOL - Web Dynpro: Messages for Workbench Tools

• Message number: 251

• Message text: Attribute &1: Mapping type &2 is not allowed

What causes this issue?

Allowed values for the mapping type of an attribute are:
None (not assigned)
Assigned
These values have the internal codings 00 and 02.
The &V1& attribute, however, has a mapping type with the internal coding
&V2&.

System Response

Error message for syntax analysis.

How to fix this error?

Assign an allowed mapping type to the attribute.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SWDP_WB_TOOL251 - Attribute &1: Mapping type &2 is not allowed ?

  The SAP error message SWDP_WB_TOOL251, which states "Attribute &1: Mapping type &2 is not allowed," typically occurs in the context of SAP Web Dynpro development, particularly when dealing with the mapping of attributes in the context of data binding or model configuration.
  Cause:
  This error usually arises due to one of the following reasons:
  
  
  Invalid Mapping Type: The mapping type specified for the attribute is not compatible with the data type or the context in which it is being used. For example, trying to map a complex type to a simple type or vice versa.
  
  
  Incorrect Configuration: The configuration of the Web Dynpro component or the data model may not be set up correctly, leading to an invalid mapping scenario.
  
  
  Data Type Mismatch: There may be a mismatch between the expected data type of the attribute and the actual data type being provided in the mapping.
  
  
  Unsupported Operations: Certain operations or mappings may not be supported in the context of the Web Dynpro application you are working on.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Mapping Configuration: Review the mapping configuration for the attribute in question. Ensure that the mapping type you are using is appropriate for the attribute's data type.
  
  
  Validate Data Types: Ensure that the data types of the source and target attributes are compatible. If necessary, adjust the data types to match.
  
  
  Review Documentation: Consult the SAP documentation for Web Dynpro to understand the allowed mapping types and configurations for the specific attributes you are working with.
  
  
  Use Correct Mapping Types: If you are using a specific mapping type (e.g., "1:1", "1:n", etc.), ensure that it is supported for the attribute you are trying to map.
  
  
  Debugging: If the issue persists, consider using debugging tools to trace the data flow and identify where the mapping is failing.
  
  
  Consult SAP Notes: Check for any relevant SAP Notes or updates that may address this specific error or provide additional guidance.
  
  
  Related Information:
  
  Web Dynpro Documentation: Familiarize yourself with the Web Dynpro programming model and the specifics of data binding and mapping.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and what solutions they found.
  SAP Support: If you are unable to resolve the issue, consider reaching out to SAP Support for assistance, providing them with the details of the error and the context in which it occurs.
  
  By following these steps, you should be able to identify the cause of the SWDP_WB_TOOL251 error and implement a suitable solution.