Bob Weir has cancelled his forthcoming tour itinerary, according to a report on Rolling Stone.

Bob Weir and his band, RatDog, have canceled all of their upcoming tour dates, citing unnamed “circumstances” as the reason, according to a Facebook post by Weir’s other group, Furthur.

“Circumstances have necessitated that all scheduled tour dates for Bob Weir & RatDog are being cancelled,” reads the message. “This applies to all dates on the summer tour starting on Thursday, August 14 in Boston through September 14 in Nashville and also includes the Jamaica event in January of 2015. Full and complete refunds are available at place of purchase. We sincerely apologize for any inconvenience.”

Weir’s former manager John Scher told Rolling Stone, “Bobby’s been having health problems for a while and now there are plenty of people who support him and want to help him get the care he needs.”

Last year, Weir was taken ill during a concert at Capitol Theatre in Port Chester, New York.

A month later, Furthur cancelled their appearance at the inaugural BottleRock Napa Valley concert. A statement at the time reported that Weir would be “unable to perform in any capacity for the next several weeks.”