How To Fix /UI5/DESCR_VAR_CHECK020 - Layer &1 is not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: /UI5/DESCR_VAR_CHECK -

• Message number: 020

• Message text: Layer &1 is not supported

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 /UI5/DESCR_VAR_CHECK020 - Layer &1 is not supported ?

  The SAP error message /UI5/DESCR_VAR_CHECK020 Layer &1 is not supported typically indicates that there is an issue with the configuration or usage of the UI5 application, specifically related to the layers defined in the application. This error can occur when the application is trying to access a layer that is not supported or not properly configured in the SAP system.
  Cause:
  
  Unsupported Layer: The specified layer (e.g., "DEV", "QAS", "PROD") is not recognized by the system or is not configured correctly.
  Configuration Issues: There may be issues in the configuration of the UI5 application or the underlying SAP system that prevent the application from recognizing the specified layer.
  Version Mismatch: The version of the UI5 library being used may not support the specified layer.
  Transport Issues: If the application is being transported between different systems, the layer may not be available in the target system.
  
  Solution:
  
  Check Layer Configuration: Verify the configuration of the layers in your SAP system. Ensure that the layer you are trying to access is correctly defined and supported.
  Update UI5 Libraries: Ensure that you are using a compatible version of the UI5 libraries. If necessary, update to a newer version that supports the required layers.
  Review Application Code: Check the application code for any hardcoded references to layers that may not be valid. Update the code to use supported layers.
  Transport Management: If the issue arises after a transport, ensure that all necessary objects and configurations have been transported correctly to the target system.
  Consult Documentation: Refer to the official SAP documentation for UI5 to understand the supported layers and any specific configurations that may be required.
  Contact SAP Support: If the issue persists, consider reaching out to SAP support for assistance, providing them with details about the error and the context in which it occurs.
  
  Related Information:
  
  SAP UI5 Documentation: Review the official SAP UI5 documentation for information on supported layers and configurations.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Engage with the SAP community forums or SAP Community Network (SCN) for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.