(the problem I found was for that place name only...)
I got the error message: "The place name you entered is already taken"
( in Italian "Il nome di area immesso è già utilizzato" ).
I made some investigation:
- no place name such that in the PlaceCatalog
- no "myplace" Quickr databases inside the Domino data directory
I found a mail-in definition document inside the Public Address Book (names.nsf), with the same name of the place I was trying to create! After deleting the mail-in definition, I was successful creating the new area.