Message type: E = Error
Message class:  RSO_RES_FRMW - BW REST Framework 
Message number: 020
Message text: The SAP GUI Editor is obsolete. Please use the BW Modeling Tools Editor.
The editor in the SAP GUI is obsolete. New features are not available.
If the object is compatible, edited is possible in the SAP GUI. If the
object is not compatible, editing is not possible.
Please use the corresponding editor in the BW Modeling Tools in Eclipse.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The error message RSO_RES_FRMW020 in SAP indicates that you are trying to use the old SAP GUI Editor for BW (Business Warehouse) objects, which is now considered obsolete. Instead, SAP recommends using the BW Modeling Tools (BWMT) editor, which is integrated into the Eclipse-based environment.
Cause: The error occurs because: The SAP GUI Editor for BW objects has been deprecated in favor of the BW Modeling Tools. You are likely trying to create or modify BW objects (like InfoObjects, DataSources, etc.) using the old editor.
Solution: To resolve this error, you should switch to using the BW Modeling Tools. Here are the steps to do that: Install Eclipse: If you haven't already, download and install the Eclipse IDE. Make sure to use a version that is compatible with the BW Modeling Tools. Install BW Modeling Tools: Open Eclipse. Go to the Eclipse Marketplace (Help > Eclipse Marketplace). Search for "BW Modeling Tools" and install the relevant plugin. Connect to SAP BW: After installing
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