Yes guitarist Steve Howe, bassist Chris Squire and drummer Alan White have canceled all dates on the outing, which was scheduled to begin August 2 in Seattle, presented by VH1 Classic. Tickets will be refunded through the point of purchase. According to the group the tour will be rescheduled at a later date.

The cancellation was prompted by immigration issues in the wake of heightened security brought on by the recent terrorist attacks in London.

“We’re frustrated as much as the fans are but we understand the importance of the heightened security and hope we can reschedule the tour at some point,” said Squire.

The tour was to have spotlighted performances by three different bands, including the pre-Yes prog-rock group The Syn, featuring Squire and original vocalist Stephen Nardelli; Yes drummer Alan White’s solo project White with keyboardist Geoff Downes; and Steve Howe’s solo guitar set.

The three principals then planned to perform their own set of Drama-era Yes songs.