Message type: E = Error
Message class:  RSO_RES_QMSGS - Messages directly related to Query Designer. 
Message number: 120
Message text: Could not delete the folder: "&1". &2
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.
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.
The SAP error message RSO_RES_QMSGS120 indicates that the system encountered an issue while trying to delete a folder, and it provides two placeholders: &1 for the folder name and &2 for additional information about the error.
Cause: The error can occur due to several reasons, including: Insufficient Permissions: The user or the system may not have the necessary permissions to delete the specified folder. Folder in Use: The folder may be currently in use by another process or user, preventing its deletion. System Lock: There may be a lock on the folder or its contents that is preventing deletion. File System Issues: There could be issues with the underlying file system, such as corruption or other errors. Incorrect Path: The specified folder path may be incorrect or may not exist.
Solution: To resolve the error, you can take the following steps: Check Permissions: Ensure that the user or the service account executing the deletion has the necessary permissions to delete the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
RSO_RES_QMSGS119 Could not create or change the folder: "&1". &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
RSO_RES_QMSGS118 Query "&1" could not be published on "&2". &3
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
RSO_RES_QMSGS121 The object type cannot be used for publishing: &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
RSO_RES_QMSGS122 Could not remove query "&1" from "&2". &3
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.