How To Fix SADL_GW021 - Property &1 requested. Only simple property paths are supported

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_GW -

• Message number: 021

• Message text: Property &1 requested. Only simple property paths are supported

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SADL_GW021 - Property &1 requested. Only simple property paths are supported ?

  The SAP error message SADL_GW021 indicates that a property path requested in a data access layer (DAL) operation is not supported because it is not a simple property path. This typically occurs when you are trying to access a complex property or a nested structure in a way that the SAP Data Access Layer (SADL) does not support.
  Cause:
  
  Complex Property Access: The error arises when you attempt to access a property that is not a simple scalar value (like a string or number) but rather a complex type or a nested structure.
  Unsupported Path: The path you are trying to use may involve multiple levels of navigation or complex joins that are not supported by the SADL framework.
  Incorrect Query Structure: The query or the data model may be incorrectly structured, leading to attempts to access properties in a way that is not allowed.
  
  Solution:
  
  Use Simple Property Paths: Ensure that you are only using simple property paths in your queries. A simple property path typically refers to a direct attribute of an entity without any nested structures.
  Review Data Model: Check the data model to understand the structure of the entities and their relationships. Make sure you are accessing properties that are directly available on the entity you are querying.
  Modify Query: If you need to access related entities or complex properties, consider restructuring your query to retrieve the necessary data in a different way, such as:
  
  Using separate queries to fetch related data.
  Flattening the data structure if possible.
  
  
  Check Documentation: Refer to the SAP documentation for SADL to understand the limitations and supported features regarding property paths and data access.
  
  Related Information:
  
  SADL (SAP Data Access Layer): This is a framework that allows for the creation of OData services and provides a way to access data in a structured manner. Understanding its capabilities and limitations is crucial for effective usage.
  OData Services: If you are working with OData services, ensure that the service definitions align with the properties you are trying to access.
  Debugging Tools: Use debugging tools available in SAP to trace the execution of your queries and identify where the error is occurring.
  
  By following these guidelines, you should be able to resolve the SADL_GW021 error and successfully access the required data.