How To Fix SDDL_PARSER_MSG421 - Path expression not allowed in projection view

SDDL_PARSER_MSG421 - Overview

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 421

• Message text: Path expression not allowed in projection view

Self-Explanatory Message

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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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG421 - Path expression not allowed in projection view ?

  The SAP error message SDDL_PARSER_MSG421 with the description "Path expression not allowed in projection view" typically occurs in the context of SAP Gateway or OData services when there is an issue with the way a projection view is defined or used in an OData service.
  
  Cause:
  This error usually arises due to the following reasons:
  
  
  Invalid Path Expression: The projection view is trying to use a path expression that is not allowed. In OData services, path expressions are used to navigate through the data model, but certain views or projections may not support them.
  
  
  Incorrect View Definition: The projection view may be incorrectly defined, leading to the inability to process path expressions. This can happen if the view is not set up to expose the necessary fields or relationships.
  
  
  OData Service Configuration: The OData service may not be configured correctly to handle the projection view, leading to issues when trying to access data through the