How To Fix SADL_GTK_GEN018 - Exposure not supported for parameter &1 without a DDIC data element

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_GTK_GEN - SADL GTK Generation Messages

• Message number: 018

• Message text: Exposure not supported for parameter &1 without a DDIC data element

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message SADL_GTK_GEN018 - Exposure not supported for parameter &1 without a DDIC data element ?

  The SAP error message SADL_GTK_GEN018 indicates that there is an issue with the exposure of a parameter in a Data Access Layer (DAL) context, specifically that the parameter does not have a corresponding Data Dictionary (DDIC) data element. This can occur in scenarios where you are trying to expose a parameter in a service definition or a query that is expected to be linked to a DDIC data element, but it is not.
  Cause:
  
  Missing DDIC Data Element: The parameter you are trying to expose does not have an associated DDIC data element. This is often the case when the parameter is defined as a simple type or a custom type that is not linked to a DDIC element.
  Incorrect Parameter Definition: The parameter might be defined incorrectly in the context of the service or query, leading to the system not recognizing it as a valid exposure.
  Incompatibility with SADL: The parameter type may not be compatible with the SADL framework, which expects certain types of parameters to be defined in a specific way.
  
  Solution:
  
  Define a DDIC Data Element: If the parameter is a custom type, consider creating a corresponding DDIC data element for it. This will allow the SADL framework to recognize and expose the parameter correctly.
  Check Parameter Definition: Review the definition of the parameter in the service or query. Ensure that it is defined correctly and that it adheres to the expected types and structures that SADL supports.
  Use Standard Types: If possible, use standard DDIC data types for your parameters instead of custom types. This can help avoid compatibility issues with SADL.
  Adjust Exposure Settings: If the parameter does not need to be exposed, consider adjusting the exposure settings in your service definition to exclude it.
  
  Related Information:
  
  SADL Documentation: Review the SAP documentation on the Service Data Access Layer (SADL) for guidelines on parameter definitions and exposure.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context on handling parameters in SADL.
  Debugging Tools: Utilize debugging tools in SAP to trace the execution and identify where the parameter is being defined and how it is being processed.
  
  By addressing the underlying cause of the error and ensuring that all parameters are correctly defined and linked to DDIC data elements, you should be able to resolve the SADL_GTK_GEN018 error.