In 1979, back in the studio, tension and conflict arose between the members. Osbourne recalls being asked to record his vocals over and over, and tracks being manipulated endlessly by Iommi. This was a point of contention between Osbourne and Iommi. At Iommi's insistence, and with the support of Butler and Ward, Osbourne was ejected from the band on 27 April 1979. The reasons provided to him were that he was unreliable and had excessive substance use issues compared to the other members. Osbourne claims his drug use and alcohol consumption at that time was neither better nor worse than that of the other members.