Supertramp have had to cancel their European tour due to founding member Rick Davies' cancer diagnosis.
The 'Supertramp Forever' shows have all been called off so Rick can receive treatment for his multiple myeloma - which attacks the plasma cells in a person's blood.
The concerts were due to be the 'Give a Little Bit' band's first shows since their 2010 European tour to mark their 40th anniversary.
In a statement announcing the unfortunate news, Rick, 71, said: "I was really looking forward to returning to Europe and playing with the band again and I'm sorry to disappoint everyone who has overwhelmingly supported the upcoming tour. Unfortunately my current health issues have derailed me and right now I need to focus all of my energy on getting well."
The tour was set to kick off on November 3 at the Gondomar Pavilion in Porto, Portugal, and continue throughout 25 European cities, culminating with the final performance on December 11 at the Ziggo Dome in Amsterdam, Holland.
Fans can contact their local promoter or the venue for details regarding ticket refunds.
'Supertramp Forever' tour full list of cancelled dates:
3 November Porto Gondomar Pavilion
4 November Lisbon Meo Arena
6 November Madrid Barclaycard Center
7 November Barcelona Palau Sant Jordi
9 November Milan Fila Forum
11 November Geneva Geneva Arena
13 November Marseille Le Dôme
14 November Montpellier Zenith (Montpellier)
16 November Nantes Zénith (Nantes)
18 November Toulouse Zénith (Toulouse)
19 November Bordeaux Patinoire Meriadeck
22 November Lyon Halle Tony Garnier
24 November Oberhausen Konig-Pilsener Arena
25 November Zurich Hallenstadion
26 November Frankfurt Festhalle
28 November Ischgl Ski Lodge
29 November Munich Olympiahalle
1 December Lille Zénith (Lille)
4 December Paris Bercy Arena
5 December Luxembourg Rockhal
7 December London O2 Arena
9 December Belgium Palais 12
10 December Hamburg O2 World
11 December Amsterdam Ziggo Dome