Morrissey, Sonic Youth, The Flaming Lips, The String Cheese Incident, Modest Mouse, The Polyphonic Spree and many more were slated to appear on the tour, which had been touted as “the first-ever two-day music festival on wheels.”

The Pixies, PJ Harvey, Wilco and others were to join the bill on select dates.

The festival was to begin July 14-15 near Seattle at Auburn, Wash.’s White River Amphitheatre, with stops planned in 16 cities through late August.

Prices at most venues were reduced to $29.50 per day for general admission and $49.50 for reserved seating, with special two-day general admission passes going for $50.

Co-founder Marc Geiger expressed shock at the poor sales, but acknowledged that times are tough across the industry.

“I am in utter disbelief that a concert of this stature, with the most exciting lineup I’ve seen in years, did not galvanize ticket sales,” he said. “I’m surprised that given the great bands and the reduced ticket prices that we didn’t have enough sales to sustain the tour.

“Concert promoters across the country are facing similar problems. Many summer tours are experiencing weak ticket sales.”

“My heart aches along with the bands,” added organizer Perry Farrell, “and all of our employees whose hard work developed one of the most exciting and important tours that this nation was to see. My heart is broken.”