How To Fix /IWFND/MED040 - ABAP Type '&1' is currently not supported in the metadata layer

/IWFND/MED040 - Overview

• Message type: E = Error

• Message class: /IWFND/MED -

• Message number: 040

• Message text: ABAP Type '&1' is currently not supported in the metadata layer

Self-Explanatory Message

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/IWFND/MED040 - Details

• The SAP error message /IWFND/MED040 ABAP Type '&1' is currently not supported in the metadata layer typically occurs in the context of SAP Gateway and OData services. This error indicates that the ABAP type specified (represented by &1) is not supported for use in the metadata layer of the OData service.
  
  Cause:
  
  Unsupported Data Types: The ABAP type being used in your data model is not supported by the OData service. This can happen if you are using complex types, certain structures, or data types that are not recognized by the OData framework.
  Custom Data Types: If you have defined custom data types or structures in ABAP that are not compatible with the OData service, this error may occur.
  Incompatible Field Types: Certain field types, such as those that are not scalar (e.g., nested structures or tables), may lead to this error.
  
  
  Solution:
  
  
  Check Data Types: Review the ABAP data types used in your OData service.