After 40 years, Steven Tyler has quit Aerosmith by walking out on the “Crazy” rockers following a performance in Abu Dhabi last month, if band guitarist Joe Perry is to be believed.

The report comes just months after the singer spoke out publicly to dismiss reports the band was on the verge of splitting. In August, Tyler broke his shoulder after falling off stage while performing in South Dakota, and the group was forced to scrap the remainder of its summer tour.

Perry admits that following the accident he and Tyler didn’t speak for more than a month and Perry fears his pal has left the rock group after its performance as part of the Formula One racing season’s final weekend in Abu Dhabi on Oct. 30.

“Steven quit as far as I can tell. I don’t know any more than you do about it. I got off the plane two nights ago. I saw online that Steven said that he was going to leave the band. I don’t know for how long, indefinitely or whatever. Other than that, I don’t know,” he tells The Las Vegas Sun.

Perry claims the discord in the band can be attributed to Tyler’s failure to return phone calls: “Frankly, the last few months I’ve been wanting not to rock the boat. I don’t want him cancelling any more gigs. We really wanted to do these last four. We just kind of didn’t want to call him out or anything and get him anymore pissed off, for whatever reason. So we just let things lie. So we did the gigs and, like I said, I got off the plane and saw this online. That’s how I know about it… He has had no contact with me or the other band members.”

Joe Perry says he’s determined to continue Aerosmith, even if its famous frontman refuses to return.

“Right now I’m adjusting to how we’re going to go on…We’re just trying to – at least I am – trying to figure out what direction the band should take….”