When trying to delete a set, you can get the following error
"Invalid method parameter: Set does not exist in database."
1. Under Manage Sets select the set and click on Edit.
2. Without making any changes click on the Save button.
3. You can see by the possition of the cursor in the field where the set name is that there are spaces and you can use the arrow keys to count how many spaces there are.
4. Open the Windows command prompt as administrotor.
5. Change directories to the util folder where NetVault Backup is installed.
cd C:\Program Files (x86)\Quest Software\NetVault Backup\util
6. Run nvsetdelete specifying the name of the set surrounded in double quotes with the extra spaces included and specifying the set type.