A museum dedicated to all things Abba has been stalled in Stockholm, Sweden.
The new building was due to open in 2009, but bosses insist renovation will take longer.
Project co-founder Ulf Westman says, "It is more complicated than what was predicted earlier."
Westman refused to estimate when the new museum would open.
When it does, it will feature rare ABBA artifacts and memorabilia donated by fans, collectors and the band members themselves.