It was while under the stewardship of Television Station Partners that WROC-TV made another switch: In April 1989, NBC announced it would end its 40-year partnership with channel 8 and move its Rochester affiliation to then-CBS station WHEC-TV. This move was the result of the station's poor performance and constant preemptions of NBC network programming (NBC was very intolerant of preemptions at this time, and was the number one network at the time, adding to NBC's aggravation with channel 8). Channel 8 began airing the full CBS schedule on August 13, 1989.