Thank you for help. In this respect you are right. 🙂

As I said. In PROPERTY it is in MODXLibraryUser, Bank Select ... MSB 64, LSB 59. As I know that I can delete only all Performances in MODXLibraryU...

I forgot to say. These undeletable performances I created myself and now they are in bank MODXLibraryUser. I remember I created this bank because I ...

You write : To create a LIBRARY you must assemble what you wish to place in that Library into your USER area. From the USER area you can SAVE as a "L...