Thank you for your message and welcome to the Cubasis forum.
Erase does not delete events selected in midi parameters
Please note that the MIDI editor comes with its own tools menu bar.
Once events have been selected via the “SELECT” button, you should be able to delete them via the “ERASE” button.
Alongside, please have a look at our dedicated MIDI editor tutorial, to check if it is of additional help for you. While the tutorial has been created using Cubasis 2, the basic steps should be comparable to Cubasis 3.
Please let me know, if this helps to solve your issue.
& stay well,