The trek, originally scheduled to kick off August 28 at Fraze Pavilion in Kettering, Ohio, and wrap September 21 at 9:30 Club in Washington, D.C., was to feature a collection of guest musicians and a 30-piece “rock fabulous” orchestra performing selections from Stewart’s substantial catalog of work.

The cancellation was announced in a post to fans on Stewart’s web site.

“Unfortunately, I have cancelled my tour dates due to unforeseen circumstances,” the message reads. “In lieu of the larger tour, my band and I will be performing at venues in select cities. The new dates and venues will be announced at a later date. I apologize for any inconvenience this may have caused anyone.”

Ticketholders should check with point of purchase for refunds.