Meanwhile, First Minister John Swinney told journalists he was "sorry to see it go".
Swinney said he had watched the show "a long time ago", adding that he did not really "have much time for soap operas in life in general these days".
His comments came as Robertson told MSPs at Holyrood: "My view in terms of the ending of River City is one of regret.
"Like many people I have watched it over the last 20 years." He added: "I do have concerns... in particular because of the training and opportunities provided by River City over the decades."
Robertson said he had...